Why Pigment Quality Can Make or Break Your Paint Brand 

admin Oct 1, 2025

If you’re in the paint business, you know that getting the right pigment isn’t just about adding color — it’s about achieving consistency, durability, and the kind of performance that keeps customers coming back. Whether you’re formulating architectural coatings, industrial finishes, or decorative paints, your pigment supplier can directly influence how your product looks, lasts, and performs in the real world. 

In this article, we’ll break down what sets leading pigment suppliers for paint apart, the critical quality factors to watch for, and how to choose a partner that aligns with your product promise. Additionally, we’ll highlight the growing importance of Azo Pigments (Red, Yellow, Orange) and High Performance Pigments (Red, Yellow, Orange) in modern paint formulations. 

What Defines a Top-Tier Pigment Supplier for Paint? 

The best pigment manufacturers understand that paint performance starts with the consistency of raw materials. So what sets them apart? 

• Consistent Batch-to-Batch Quality – Delivering uniform particle size, color shade, and dispersibility across every batch. 

• High Tinting Strength – Strong color intensity that reduces pigment consumption and improves cost-efficiency. • Light & Weather Fastness – UV-resistant pigments that prevent fading and chalking in outdoor and indoor applications. 

• Dispersibility in Different Media – Stable performance across water-based, solvent-based, or hybrid paint systems. 

• Regulatory Compliance – Products that meet global environmental and safety standards such as REACH, ROHS, and APAT. 

Key Pigment Categories Used in Paint 

Different pigments serve different needs. Here’s a breakdown of the major types used in paint manufacturing: 

How to Choose a Pigment Partner for Your Paint Business 

Before you place your next pigment order, consider these points: 

• Application-Specific Grades – Pigments tailored for emulsions, high-gloss enamels, or protective industrial coatings. 

• Technical Support – Assistance with dispersion, stability issues, and shade matching. • Scalable Supply & Fast Logistics – Reliable warehousing and order fulfillment to prevent production delays. 

Alliance Organics: Your Partner in Pigment Reliability 

At Alliance Organics LLP, we know the demands of the modern paint industry — and we meet them with:

• A broad portfolio of pigments suited for architectural, decorative, and industrial coatings, including Azo and High Performance Pigments. 

• In-house production of copper phthalocyanine for blues and greens. 

• ISO 9001:2015 certified manufacturing and ROHS/APAT compliant pigment ranges. • Custom solutions backed by formulation support and TDS/SDS documentation. 

FAQs: Pigments for Paint 

What pigments are best for outdoor paints? 

Iron oxide pigments, high-performance reds/yellows/oranges, and phthalocyanine blues/greens for superior UV resistance. 

Are organic pigments better than inorganic ones? 

Not always. Organic pigments offer brightness and tinting strength, while inorganic pigments provide durability and UV resistance. 

What are the benefits of using high tinting strength pigments? 

They reduce the amount of pigment needed per batch, improving cost efficiency and color vibrancy. 

How can I avoid shade variation in paint production? 

Work with a supplier that ensures consistent batch-to-batch quality and provides shade cards with lab data. 

Can Alliance Organics help with custom color formulations? 

Absolutely. Our technical team collaborates with your formulators to match shades, adjust tone, and ensure application success.

Choosing the Right Pigment for Plastics: Key Considerations 

admin Sep 3, 2025

If you’ve ever stood in a production line, watching a batch of plastic components come out slightly off-shade from the previous one — you know just how crucial it is to pick the right pigment. It’s not just about colour anymore. The right pigment for plastics directly affects consistency, durability, and sometimes even compliance. 

Whether you’re in automotive, packaging, electronics, or consumer goods, selecting the right pigment plays a pivotal role in how your final product performs — and how it’s perceived by the customer. 

Let’s walk through what really matters when choosing pigments for plastic applications.

Understand Your Resin System First. 

Before you even think about colour, ask yourself: what polymer are you working with?  Polypropylene (PP)? ABS? PET? HDPE? 

Not all pigments behave the same way across different resins. For instance: 

• Organic pigments may offer high colour strength and brightness but sometimes lack thermal stability. 
• Inorganic pigments like iron oxides or titanium dioxide tend to be more stable but offer less vibrant shades. 

When in doubt, always request compatibility tests or samples. A pigment might work beautifully in one polymer and degrade or discolour in another. 

Heat Stability is Non-Negotiable 

Pigments for plastics must survive processing temperatures. For example, injection molding typically operates at 200–300°C depending on the polymer. You’ll want pigments that don’t degrade, discolour, or release harmful volatiles at those temperatures. 

 Tip: If you’re working with engineering plastics like nylon or PBT, go for pigments with proven heat resistance above 280°C. 

Think About the Final Application

This is where end-use functionality comes in. Ask yourself: 

• Will the plastic be used outdoors? 
• Will it be exposed to chemicals, UV light, or high temperatures? 
• Is food contact approval necessary? 

For outdoor applications like garden furniture or automotive trim, UV-resistant pigments are a must. In packaging for food or cosmetics, non-toxic and FDA-compliant pigments  (or EU/FSSAI compliant if you’re exporting) are mandatory. 

Opacity vs. Transparency 

This is often overlooked. If you’re coloring translucent containers or films, your pigment choice will differ significantly from someone making opaque toys or pipes. 

• Transparent colours require high-purity pigments with minimal filler or opacifying agents. 
• Opaque applications often use titanium dioxide in combination with coloured pigments for better hiding power. 

Cost vs. Performance 

Let’s be real — budgets matter. But going for the cheapest pigment might cost you more in rejections, colour mismatches, or returns. 

Instead of comparing just per-kilo prices, compare cost-in-use: 

• What’s the pigment’s tinting strength? 
• How much do you need per batch? 
• Are you getting consistent shades from batch to batch? 

A slightly more expensive pigment that offers high coverage might end up more economical in the long run. 

Supplier Reliability: Don’t Skip This 

Honestly, even the best pigment is only as good as the supply chain behind it. Delays,  inconsistency, or poor technical support can derail your production line.

Look for a plastic pigments manufacturer that offers: 

• Consistent product quality 
• Batch-to-batch shade reliability 
• Prompt technical support 
• Regulatory compliance (ROHS, etc.) 
• Global logistics capability if you’re exporting 

Why Alliance Organics? 

Here at Alliance Organics, we understand that pigments aren’t just colours — they’re integral to your production and your brand identity. Our plastic pigments are manufactured using strict quality control with the flexibility to meet your application-specific needs. 

What sets us apart? 

We manufacture our own copper phthalocyanine base, allowing us to offer competitive pricing and availability. 

Our range of pigments includes both organic and inorganic options, with excellent dispersibility and heat stability. 

We offer custom shade matching, TDS & MSDS documentation, and post sales support. 

If you’re searching for the best pigment for plastics, we’d love to help you identify the right formulation without the guesswork. 

 Contact us today for a consultation or request a sample pack. 

Frequently Asked Questions (FAQs) 

Q1. What pigments are best for food-grade plastic applications? 

Pigments that are non-toxic, heavy-metal free, and compliant with FDA, EU, or FSSAI  norms are recommended. Always check with your supplier for certifications.

Q2. Can I use the same pigment across different plastic resins? 

Not always. Some pigments are resin-specific due to chemical compatibility or thermal stability limits. Always verify with trials. 

Q3. What’s the difference between masterbatch pigments and powder pigments? Masterbatch pigments are pre-dispersed in a carrier resin and offer better ease of use and consistency. Powder pigments require more care in dispersion. 

Q4. How do I ensure colour consistency across batches? 

Work with a pigment supplier who guarantees batch-to-batch consistency, and use spectrophotometers to track Lab* values during production. 

Q5. Are plastic pigments UV stable by default? 

No. UV stability depends on the pigment chemistry. For outdoor applications, always  choose pigments specifically designed for UV resistance

Why Liquid Dyes Are Transforming Modern Paper Manufacturing

admin Aug 25, 2025

In the fast-paced world of paper manufacturing, precision, efficiency, and sustainability are no longer optional—they’re essential. Enter liquid dyes, the modern solution that’s transforming how the paper industry adds colour to products. From notebooks and napkins to packaging and specialty papers, liquid dyes are helping manufacturers strike the perfect balance between vibrant aesthetics, operational efficiency, and environmental compliance. 

What Are Liquid Dyes? 

Liquid dyes are water- or solvent-based colorants pre-dissolved into a ready-to-use  liquid form. Unlike traditional powder dyes, they don’t require additional processing or dispersion before use, making them ideal for high-speed, continuous paper production. 

Common types of liquid dyes used in paper manufacturing include:
• Basic Dyes: Known for their brightness and affinity for wood-based pulps
• Direct Dyes: Offer better lightfastness and are widely used for uncoated paper
• Acid Dyes: Typically used in specialty or coated paper grades 

Key Advantages of Liquid Dyes in Paper Production 

1. Improved Process Efficiency 

Liquid dyes are fully soluble and easy to meter,  enabling precise colour dosing in real-time. This allows for faster colour changes,  reduced machine downtime, and seamless integration with automated systems. 

2. Consistent Colour Quality 

With liquid dyes, manufacturers achieve uniform  colour distribution across the paper web, minimizing shade variation and  rework. This is particularly crucial in packaging and branding applications where colour consistency is critical. 

3. Enhanced Safety and Cleanliness

 Powder dyes often create airborne particles and dust, leading to health and hygiene concerns on the shop floor. Liquid dyes eliminate dust generation and reduce the risk of cross-contamination. 

4. Environmentally Friendly 

Many liquid dyes are low in VOCs, require less water for dispersion, and are designed for improved effluent treatment. They support eco-conscious manufacturing by minimizing waste and aligning with sustainability goals. 

5. Customizability and Flexibility 

Liquid dyes allow for on-the-fly adjustments and can be tailored for a range of substrates—be it tissue, kraft, newsprint, or decorative paper. This versatility opens new opportunities in niche and premium segments.

Applications in Modern Paper Mills 

• Tissue Papers: Soft hues or vibrant colours for hygiene products and tableware
• Packaging Papers: Strong, stable colours for kraft liners and folding cartons 

• Decorative & Specialty Papers: Custom shades for gift wrap, wallpapers, and  art papers 

• Security & Watermarked Papers: Specialized dyes for confidential documents  and currency paper 

Considerations When Using Liquid Dyes 

While liquid dyes offer multiple benefits, manufacturers must consider:
• pH compatibility with the pulp and additives 

• Retention efficiency within the fibre matrix 

• Interaction with sizing agents, fillers, and optical brighteners 

• Stability under heat and shear stress in high-speed machines 

Partnering with experienced suppliers ensures that formulations are optimized for performance, safety, and compliance. 

The Future of Colour in Paper 

As paper manufacturers adapt to evolving consumer demands and regulatory pressures, liquid dyes are set to play a pivotal role. Innovations such as microencapsulation for controlled release, biodegradable dye systems, and AI driven colour management are already redefining what’s possible in paper coloration.

Dyes for Leather: Everything You Need to Know Before You Start 

admin Aug 22, 2025

Ever wondered how a plain leather hide is transformed into a vibrant, beautifully colored handbag, a classic brown jacket, or a rich blue car seat? The magic lies in the dyeing process, and at the heart of that process is the selection of the right colorant. Choosing the perfect dyes for leather is a critical step that defines the final product’s look, feel, and durability. 

But with so many options available, where do you even begin? Don’t worry, we’re here to help. This guide will walk you through everything you need to know about dyes for leather, helping you make an informed decision for your next project. Let’s dive in! 

What Exactly Are Dyes for Leather? 

Unlike paints that sit on the surface,  Dyes for leather are designed to penetrate the fibrous structure of the hide, forming a chemical bond with it. This results in a rich, deep color that doesn’t crack or peel and allows the natural beauty and grain of the leather to show through. The type of dye you use depends heavily on the type of leather you are working with and the final result you want to achieve. 

The Main Types of Leather Dyes 

The world of leather coloring is vast, but it’s primarily dominated by a few key players.  Understanding the different leather dye colors and types is the first step to success. 

Acid Dyes: These are a cornerstone of modern leather dyeing. Acid dyes are highly versatile and are known for producing brilliant, vibrant colors with good lightfastness.  They are a type of  

water-based leather dye, making them easy to work with and better for the environment. They have excellent affinity for chrome-tanned leather, which is the most common type used for fashion, upholstery, and footwear. 

Direct Dyes: Direct dyes are another popular type of water based leather dye. They are known for their ability to produce deep, full shades, especially in darker colors like black and brown. They have a high affinity for both vegetable-tanned and chrome-tanned leathers and are often used for their good penetration and economical performance. 

Natural Dyes for Leather. For centuries, all leather was colored using natural dyes for leather, derived from plants, minerals, and even insects. Common  sources include tannins from quebracho and mimosa trees for browns, and logwood for blacks and purples. While they are an eco-friendly option, natural dyes for leather typically produce more muted, earthy tones and may offer less consistent results and lower fastness compared to modern synthetic dyes.

One of the most exciting parts of leatherwork is selecting the color. Modern synthetic dyes, like acid and direct dyes, offer an almost limitless spectrum of leather dye colors, from bright primary shades to deep, sophisticated tones. 

It’s important to remember that the base color of the leather will affect the final shade.  Dyeing a light tan hide will produce a much different result than dyeing a darker brown one. The key is to test your dye on a small, inconspicuous area first to ensure you achieve the desired color. 

Choosing Your Perfect Leather Dye Colors 

Water Based Leather Dye: The Modern Choice 

Today, water based leather dye formulations (which include both acid and direct dyes)  are the industry standard for most applications. Why? 

• Eco-Friendly: They have lower VOCs (Volatile Organic Compounds) than older,  solvent-based systems. 

• Ease of Use: They are easy to mix and dilute with water, and cleanup is simple.
• Vibrant Colors: They can produce exceptionally bright and clear shades. 

One thing to note is that a water based leather dye can sometimes “raise the grain” of the leather. This is a normal part of the process and can be easily managed by buffing the leather after it dries. 

Key Factors to Consider Before You Start 

Before you purchase your dyes for leather, ask yourself these questions: 

• What type of leather am I dyeing? Is it chrome-tanned or vegetable-tanned?  This will heavily influence your choice between dye types. 

• What is my desired color? Do I need a bright, vibrant shade (perfect for acid  dyes) or a deep, dark color (a strength of direct dyes)? 

• What are the fastness requirements? Will the final product be exposed to a lot  of sunlight or moisture? For high-performance needs, metal-complex acid dyes  are often the best choice. 

• What is my application method? Will you be spraying, brushing, or dipping the  leather? The dye you choose should be suitable for your method. 

Choosing the right dyes for leather is a blend of art and science. By understanding the  key differences between dye types like acid, direct, and natural dyes, you can ensure  your project has the beautiful, durable, and professional finish it deserves. The versatility of modern colorants, especially the wide range of leather dye colors available in water based leather dye systems, has opened up a world of creative  possibilities. 

If you have a project in mind and need help selecting the perfect dye, don’t hesitate to reach out. Our experts are always here to guide you to the perfect color solution.

Why Solvent Dyes Are Ideal for Plastic Coloring: A Technical Breakdown

admin Aug 21, 2025

Have you ever admired the deep, vibrant, and perfectly transparent color of a plastic bottle, a car’s tail light, or a brightly colored pen? The secret to achieving that flawless, jewel-like hue isn’t paint or pigment, but a special class of colorants known as solvent dyes. 

While pigments are excellent for creating opaque colors, Solvent Dyes are the  undisputed champions when it comes to transparent coloration and high-performance  applications. But what makes these solvent based colorants so effective for plastics? 

This technical breakdown will explore why Solvent Dyes for Plastic are the ideal choice  for a huge range of modern polymer applications. 

What Are Solvent Dyes and How Do They Work? 

The magic of a solvent dye lies in its name: it dissolves. 

Unlike pigments, which are fine, solid particles that are dispersed within the plastic (like  sand mixed in water), Solvent Dyes dissolve completely into the polymer at a  molecular level during the melting process (like sugar dissolving in water). This  fundamental difference is the key to all their advantages. Because the dye molecules  are individually distributed throughout the plastic, they don’t scatter light, resulting in  exceptional transparency and brilliance. 

The Key Advantages of Using Solvent Dyes for Plastic 

Choosing the right colorant is critical, and solvent based colorants offer a unique set  of benefits that make them indispensable for high-quality plastic products. 

1. Exceptional Transparency and Brilliance This is the number one reason to choose  Solvent Dyes. Because they dissolve completely, they provide a crystal-clear color that  allows the natural transparency of the plastic to shine through. This is essential for  products made from resins like acrylic (PMMA), polycarbonate (PC), and polystyrene  (PS). 

2. High Color Strength Solvent Dyes are incredibly powerful. A very small amount of  dye can produce a strong, deep, and vibrant color. This high tinctorial strength makes  them a very cost-effective coloring solution, as less colorant is needed to achieve the  desired shade. 

3. Excellent Heat Stability The world of plastics involves a lot of heat. High performance Solvent Dyes for Plastic, such as those from the anthraquinone,  quinoline, and perinone chemical classes, are engineered to withstand the high  processing temperatures of engineering plastics like PET and polyamide (Nylon) without  degrading or changing color.

4. Good Solubility & Easy Dispersion These dyes are designed to be readily soluble in  the polymer melt. This ensures a consistent, homogenous, and speck-free coloration  throughout the final product, which is critical for maintaining high quality and avoiding  defects. 

5. Good Fastness Properties Many high-quality Solvent Dyes offer good lightfastness  and resistance to migration. This means the color won’t fade easily when exposed to  light and won’t bleed or move from one plastic layer to another over time, ensuring the  product’s aesthetic appeal lasts. 

Choosing the Right Solvent Dyes for Plastic Applications 

Not all solvent based colorants are created equal. The right choice depends on the  specific plastic and its end-use. For example: 

• Anthraquinone Dyes: Offer a wide range of bright colors (reds, blues, greens)  with good heat and light stability. 

• Quinoline Dyes: Known for producing brilliant greenish-yellows with excellent  heat stability. 

• Perinone Dyes: Provide top-tier heat and weather resistance, making them ideal  for high-performance oranges and reds in automotive applications. 

When it comes to coloring plastics, the choice of colorant has a huge impact on the final product’s quality, durability, and appeal. For applications that demand high transparency, brilliant color, and excellent stability, Solvent Dyes are the clear winner. By dissolving into the polymer matrix, these powerful solvent based colorants provide a level of clarity and vibrancy that pigments simply cannot match. If you’re looking to elevate your plastic products with stunning, durable color, exploring the world of Solvent Dyes for Plastic is your next logical step. Our experts are always here to help you find the perfect colorant for your specific polymer and application needs.

How Indian manufacturers conduct stringent QC for food colors and lake colors – Focus on F & B and Cosmetic Industry supplies

admin Feb 17, 2023

There is a strong reason why colorants are important for industries related to Food and Beverage and cosmetics. As natural tones tend to vanish, fade or expire, shelf life of the product is limited. Hence, colorants are required to enhance the texture, tonal quality and length of its consumption. However, they are prepared under controlled conditions. Strict policies are followed to conduct stringent quality control in the labs.

We explain how coloring has a long-term effect and how manufacturers conduct lab tests to improve flavors to avoid allergy.

Focus on Indian manufacturers

India is a leading player in the field of manufacturing Food Colours for Food & Beverage and cosmetic industries. Color is an active component for make up where one needs to differentiate shades of lipsticks, eye shades, nail polishes and foundation creams. In the Food & Beverage industry synthetic food colors enhance look of the product . For example, turmeric, roses and violet sugar have been used since ancient times to preserve food. Earlier, only such natural dyes were used as solvents. Now most foods contain ‘permitted food colors’ as recommended by FDA or European Commission for testing food color or JEFCA. Manufacturers have to adhere to the policies and standards by these three international authorities. India is a hub for making food colors and lake colors. All manufacturers have to comply to international standards set by these establishments.

Tests for QC

Quality control begins at a sophisticated testing lab. Various tests are conducted for allergy, customized manufacturing, raw material analysis, strength & tone with the treatment of spray dried powder. Harmful chemicals, dyes or pigments are avoided for safety and health of the people consuming the products. Both, food and cosmetic industry have critical requirements where the ‘exact color’ is important for product acceptance. Technology and tools provide accuracy while conducting the testing and help teams to:

• Make objective analysis before the actual product is made.
• Reports are prepared with different tests for analysis.
• Visualize the ultimate product result.
• Get consistent color quality with food and lake colors.
• Helps in productivity and cost estimation.
• Adherence to authorities.

Dyes and lake colors

There are 2 types of color additives approved by FDA, European Commission for testing food color and JEFCA. They are referred as dyes (water soluble) and lakes (not soluble in water). High quality pigments are made only after stringent quality control tests. Lake colors are made with soluble dyes and addition of metallic salts. They are mixed with fat, sugar and various oils. The aluminum lake colors are found commonly in eye makeup and for coating drugs.

Safety first

The makeup industry is worth trillions of dollars across the globe. As different make up products touch the human skin for long, raw materials have to be skin-friendly. Latest trends may bring in new colors. But standard adherence for QC has to be maintained to stay away from legal and medical problems.

The colorants have to be:

1. Consistent to use
2. Have stability
3. No allergy reactions
4. Follow mandatory international laws

Manufacturers who follow the testing standards for QC are always preferred to do business.

Migration of manufacturing dyes and pigments to Asian companies – Indian suppliers meet mandatory international protocols

admin Feb 17, 2023

The dyes and pigment manufacturing companies are poised for a new growth in Asia. The business shift from Western countries towards low cost development in Asia is the primary reason for this migration. But what’s more important is the delivery of quality products that marks the rise of Asian manufacturers particularly India. Low cost is not the only factor for this shift.

We offer other critical reasons that make Asia a better hub for producing quality pigments for a slew of other industries worldwide.

Mandatory qualities defining high-grade pigment production

While India boosts of many small and big manufacturers, there are a handful few who meet global client requirements. We all know pigments are vital to our daily life and why the right shades empower products ranging from textiles, cosmetics, paint, paper F & B and Pharma. This market is largely triggered by the need for coloring in the above industries to enhance their product values. They are valuable for coatings and printing inks which have versatile applications. Worldwide, the textile industry is the largest consumer for dyes and pigments. The Asia Pacific regions offers the best services, solutions and product customization.

Clients opt for vendors who deliver:

1. Wide range of pigments and dyes with multiple usage.
2. Technical expertise and professionals who understand industry trends.
3. Ideal pricing for customized colors and texture.
4. Good quality is adjudged by tests conducted before manufacturing.
5. Tests are important to sign the deal for the product production.
6. Timely packaging and delivery to the client.
7. Optimal customer service and support.

Manufacturers who adhere to government regulations and environmental policies are recognized as ideal service providers.

Latest production technologies

In Europe and western countries, environmental policies are more stringent and production expenses are mounting. In the Asia-Pacific region, manufacturers continue to follow international protocols to provide lower costs. Production technologies have improved in India. The manufacturers use the best equipment, infrastructure and automated systems to produce a flurry of pigments and dyes. It attracts more clients to do business in the sub-continent. The demand for reactive dyes and Pigments have increased due to good quality of product generation. The cheap labor and lowered operational costs bring more business. Being eco-friendly and affordable are other reasons why Indian manufacturers are preferred. Industries like paper, leather, cosmetics and textiles will always require the services of such manufacturers.

As the demands grow, this industry is likely to be worth USD 99 billion by 2021.

Which Asian manufacturer should y
ou do business with?

Since there are plenty of low cost manufacturers, it is best to have specific criteria to deal with the best vendors for your customized requirement. A company that has several services and product generation under a single hub is the ideal threshold. Look for an experienced lab which offers:

• Organic and inorganic pigments
• Food dyes and lake colors
• Dyes for soaps and detergents
• Phthalocyanine pigment
• Basic Dyestuffs
• Direct dyes
• Resist salt
• Solvent Dyesc
• Fluorescent dyes
• Plastic dyes

Manufacturers of Food Colours who follow the latest standards devised by FDA, European Commission for testing food colors and JECFA are preferred for business. They have certifications that are exhibited on the website.

Application Of Basic Dyes For Paper Industry

admin Feb 16, 2023

Looking upon the chronicle use of dyes, the paper and pulp industry seeks the most primitive position.

Dyestuff manufacturers offer a wide range of colorants with due innovation to serve quality products for their customers. Basic dyes find their prominent presence in paper dyeing processes. The paper dyeing industry put all their diligence of dyeing paper into the ultimate use of the paper.

Depending upon the consistency of the constituent used in dyestuff, paper is dyed bifurcation, as in powder as well as liquid form. The final abode of the paper decides their colorants. We as a Paper Dyes manufacturers in India keep our scope of dyestuff nearly for all vivid uses such as cardboard, tissue paper, recycle paper, depending upon the requirement of its application.

Basic dyes enhance the brightness and add depth with contrasting shades. Conventional basic dyes are now overtaken by imploring direct dyes to blend with basic dyes. Basic dyes are also seen as progressive for the environment. Blending dyes with the right pigment saturates the brightness of paper and these are termed optical brighteners.

Basic paper dyes are ideally suited for tinting papers used in the writing industry but achieving brilliant shades of colour on cardboard. Packaging paper can also be done using basic dyes.

Within the paper and pulp industry, all sorts of paper are included. Besides the paper used in the printing and press industry, the other arenas where papers are used are in producing facial tissue papers, envelope grades, cover papers, corrugated cases, specialty papers et cetera.

Following are the required characteristics of paper dyes to stand out in the paper dyeing industry –

• Must possess affinity towards the selected paper.
• Should be fastened to light.
• Paper bleeding should be eliminated.
• Should withstand moisture and humidity.
• Temperature stability.
• Regulatory compliant.
• Optimum depth.
• Safe to handle.

Some classic examples of basic dyes for paper are crystal violet, toluidine blue, methylene blue, malachite green, etc.

The build-up material of paper that is cellulose typically consists of negatively charged cell walls, in contrast, basic dyes acquire positive charges, so when basic dyes are applied over the walls of cellulose the positive chromophores in basic dyes tend to stick to the cell wall making them positive stains.

Chromophores are the part of the molecule responsible for its colour which is present as a cation.

Reaching towards the concluding lines, in order to attain colour perfections in your products, it is intelligently important to source colorants from reputed manufacturers.