The Colouring of Plastic: The basic colours (original colour) of most of the plastic that we use in daily life are white, yellowish or transparent. Other colours have to be added before or after the production process. At present, mainly 3 basic colouring methods are adopted:
Pigment
Compounding
Masterbatch
Vencaili® Biodegradable Masterbatches
Additive
All these methods are used with the materials and the colour are well mixed prior to the beginning of production. We also have various Additives supply.

Pigment is made by basic colouring powder and specially compounded colouring powder. Its advantages:
- Low price
- Short Production lead time
- High Flexibility
- Easy to store, reduce stock burden

As pigmenting has been used for a long time, it is a relatively primitive colouring method and has quite a number of defects:
The use of powder may cause pollution, and it is difficult to clean. The mixing ratio is low, so the colour has weak concealing powder.
The colour may have uneven distribution. Coloring powder cannot be used when producing opaque products.
The above situations are even more obvious when producing large–scale and high-quality products.
Major product includes:
- Tailor-made pigment
- Pearlescent effect
- Angle-oriented effect
- Metallic effect
- Phosphorescent Pigments
- Fluorescent Pigmen

For further information, please e-mail to: dg.marketing@nhh.com.hk

Compounding is a mixture of material and colouring powder with extruder cutting into pallet form. Its advantages:
- Easy to use.
- Without the pollution problems of pigments.
- The process is easy to handle, and provides better the colouring powder diffusion.
It is often used by the production of demanding or large-scale products.
Nevertheless it also has its disadvantages:
- When being processed in local factory, large order quantity usually results in high stock cost but it is uneconomical for small order either. The Costs may be even higher when there is purging in the process of mixing colours.
- Increasing the burden of the warehouse stocking, and lowering its flexibility.
- The process, especially for the engineering plastic, inevitably alters the physical and mechanical natures of the plastic.
For further information, please e-mail to: dg.marketing@nhh.com.hk

Masterbatch with the economic developments of countries, tremendous effort has been involving in the research and development of plastic materials and colourings. Today, the available choices of colouring materials are very broad and with different kinds of colours and categories.
The major colouring materials include:
- Masterbatch
- Pigment
- Colour Sand
- Pre-colour
- Liquid colourant
Nevertheless, masterbatch has the best overall performance among the other alternatives.
Masterbatch is a new development in recent years. It is a polymer with high concentrated colourants contained in the resin homogeneously. When added with different additives and materials, various types of masterbatch could be produced, such as anti-static masterbatch, heat resistance masterbatch, filler masterbatch, conducting masterbatch, anti-bacterial masterbatch and others with agriculture purposes.

Masterbatch is mainly composed by colourant, carrier and dispersing agent:
Colourant: It is the major ingredient in the masterbatch and is selected according to the particular nature of plastic.
Carrier: It allows colourant distribute more evenly and provides the pellet shape for the masterbatch.
Dispersion Agent: Its main function is to moisture the surface of the colourants, thus allowing better dispersion and stability inside the resin. In general, dispersing agent is a polyethylene wax.

Today, the most common scale of masterbatch is 4%, which means for 1 kg masterbatch, 25 kg resin can be coloured. Or, other scales can be used according to a specific need. Masterbatch is simple to use: with a right amount of masterbatch mixed with the plastic material in the mixing machine for around 3 minutes, and getting dried according to the requirements, the material will be ready to be directly processed. If suitable carrier and additive are used, masterbatch could be applied in various processed, e.g. blow moulding, injection, extrusion and etc.

Masterbatch not only brightens up the plastic materials with miscellaneous range of colours, it also has other advantages:

- Stability, high chance of preserving the original colour
- Fast colour change
- Environmental friendly
- Good dispersion
- Less effect on the resin properties
- Low scrape rate
- Lower cost (when comparing with compounding)

In today’s highly competitive market, various plastic-consuming industries, in particular the home appliances industry, are completed fiercely and globally as more international firms are trying to grab the opportunities which would be offered by China after joining WTO. In order to stay competitive, resources must be chosen very carefully and with the advantages of masterbatch, it is not hard to understand why it is getting popular.
Major products include:
- Tailor-made colour masterbatch
- Quali Black Masterbatch
- Quali White Masterbatch
- Quali Fibre Masterbatch
- Marble effect
- Masterbatch for film
For further information, please e-mail to: dg.marketing@nhh.com.hk

Black Masterbatches
Are you looking for black masterbatches with high gloss, high degree of jet-ness with desirable dispersion? Searching for a good quality yet economical black masterbatch is not an easy task! Our specially formulated black masterbatches can indeed bring out the best performance and quality of your plastic products.
1. Premium Grade Black Masterbatches for Blown-film
The fine size carbon black particles in black masterbatches are generally responsible for the poor dispersibility. Our specially premium grade black masterbatches have been specially formulated based on our years of experience which have proved to have overcome this dispersion problem. The high gloss silky surface finish properties make them as an ideal choice for film blowing.
Products: M3 / M13 / M23
2. Premium Injection Moulding Grade Black Masterbatches
This series of distinctive black masterbatches uses premium quality and specially processed polymer as their carrier . They are highly compatible with most of the common plastics used in the industry, and have been found to have not caused any adverse effects on the overall physical properties of the finished moulded items. Their excellent gloss performance, high degree of jet-ness, and good tinting strength have enabled them to be the most suitable candidate for the manufacture of high quality injection moulding products.
Products: M5 / M6 / M7 / M16 / M19
3、Professional Extrusion Grade Black Masterbatches
This professional extrusion series black masterbatches has the characteristics of high degree of jet-ness and good tinting strength. They are cost effective masterbatches as proved by their low let down ratio property, and are suitable for general purpose extrusion.
Products: M18
For further information, please e-mail to: dg.marketing@nhh.com.hk

White Masterbatches
Our standard white masterbatches incorporate titanium dioxide(TiO2) of outstanding properties to provide excellent resistance against ultra violet, weathering, heat, and light. This series of masterbatches is suitable for film-blowing, calendering, casting, and injection moulding.

1. Professional Blown-film Grade White Masterbatches
The blue-shade white masterbatch series is characterized by excellent hiding power， and is absolutely free from regrinds. Its superior dispersion performance minimizes the presence of fish eyes, uneven, wrinkled surfaces, and surface colour difference that generally found on film type products.
Products : L0054 / L0065 / L071L

2. Excel Cast Film/Lamination GradeWhite Masterbatches
Our excel cast film/lamination grade masterbatches have excellent heat resistance, hinding power, and dispersion characteristics. Even at high processing temperature, there will not be any colour distortion nor die-deposit. They are the ideal choice for cast film and lamination.
Products: L0048 / L0040

3、Master Injection Moulding GradeWhite Masterbatches
Our universal masterbatches employ premium quality polyolefin as the carriers with high titanium dioxide(TiO2) loading. They are compatible with almost all common thermoplastics and do not cause any adverse effects on the overall physical properties. The low let down ratio helps to minimize the production costs.
Products: UN78
For further information, please e-mail to: dg.marketing@nhh.com.hk

QualifiberTM Masterbatches for PP filament
1. Colour Masterbatches
2. High Loading Single Pigment Masterbatches
3. Fluorescent Masterbatches
4. Functional Masterbatches
5. Others

1. Colour Masterbatches
We provides standard masterbatches and customer masterbatches for PP fiber industries , such as textile filament, staple fiber, bulk continuous fiber, and spunbonded non-woven fabrics. Our experience designing colour masterbatches have excellent spinability, outstanding colour fastness and the longest pack life, ensuring the best cost-efficient to our customers.
Main Item of QC
Heat resistance
According to the DIN 53772 standard, heat resistance should reach 240℃ or bove.
Light fastness
The light fastness is accessed against the international standard ISO 105-B02 by using grade 1-8, where grade 8 has the highest light fastness and 1 has the lowest light fastness. The light fastness should reach grade 4 or above.
Filter pressure value
Filter pressure is usually controlled within 1.0bar/g. 0.5bar/g or lower denotes tested masterbatches with excellent filtration. Therefore, the pack of life cycle is longer and the spinability is better.

2. High Loading Single Pigment Masterbatches
The masterbatches remain excellent dispersability and spinability for PP fiber, the end used products can attain reasonable colour strength with a smaller dosage, which leading to much more benefits to our customers:

1. Improving spin performance
2. Lower colour-cost
3. More lower cost of transportation and inventory.

3. Fluorescent Masterbatches
The line of masterbatches imparts strong fluorescent effects to PP fiber or fabric either under ultra-violet or daylight exposure.
4. Functional Masterbatches
5. Others
UV-Resistant Masterbatches
With high molecular weight hindered amine light stabilizers (HALS), it shows excellent compatibility, high resistance to extraction and low volatility in the fiber processing , leading high effect and long-term of light stability to PP fiber / fabric.
Antistatic Masterbatches
Incorporating into the polymer matrix during the extrusion process, the antistactic agents in the masterbatch build up a conductive path to bring charged particles into contact, reducing the surface resistivity of fabric and making the fabric soft.
Flame Retardant Masterbatches
It is a high efficient halogen-containing flame retardant masterbatch, with a dosage of 4%~6%, the fabric could reach an oxygen index above 28 in the burning test. The masterbatches is also in complied with BS5852-Part1:1979.

Antimicrobial Masterbatches
For further information, please e-mail to: dg.marketing@nhh.com.hk

Qualifilm Masterbatches
is our newest brandname specialized in film which made from LDPE, HDPE, PO or PP. The heat resistance of Qualifilm can reach up to 250oC and with light fastness range from 6 to 8 units. With the combination of heat resistance and light fastness. Qualifilm is in complied with EN71. Part 3. Qualifilm is available in a wide range of colors and it can also be easily customized to satisfy all your needs.
Features:
- Good compatibility with polyolefins.
- Excellent resistance to light and heat.
- Excellent pigment dispersion to minimize uneven surface in film blowing.
- High gloss and consistent color shades for consistent resultant color.

*The suggested let down ratio varies from 3 to 6 percent.

Testing Method:
Heat Resistance
Heat resistance was determined by placing the test specimens inside the barrel of an injection moulding machine for 5 minutes. Change in colour was accessed against the international standard ISO A02 1-5 grey scale, where 5 has the highest resistance.
Light Fastness
Light fastness was determined by using the Xenon lamp exposure test in accordance with the international standard ISO 105 B02. Assessments were compared against the 1-8 blue wool scale, where 8 has the highest light fastness.
Migration Resistance
Migration resistance test was conducted by direct contact of the colored sheet with a white plasticised PVC sheet. Stained contact sheet will be assessed by using the 1-5 scale, where 5 denotes no migration.
For further information, please e-mail to: dg.marketing@nhh.com.hk

Masterbatches with Marble effect & granite effect
The marble masterbatches series comes with two different effects: Marble & granite, in which both providing superior and new colour for our customers while the colour can be tailored exactly according to user specifications. Our marble masterbatches series is particularly suitable for injection and extrusion. With a concern of the safety level, our marble masterbatches series is in compliance with the regulations of FDA and EN71, therefore having a wide range of application in various area: kitchen utensils, food containers, accessories, household appliances and toys etc.

For further information, please e-mail to: dg.marketing@nhh.com.hk

Product Description:
Vencaili® Biodegradable Masterbatches passed several tests of EN 13432-2000 & ASTM D 6400-2019, which including heavy metal content, biodegradation rate, disintegration test, plant growing test & earthworm toxicity test in TÜV Rheinland Laboratory. Under the condition of industrial composting, biodegradation rate of masterbatches can reach up to 90% in 180 days, material transforms into CO2, water & biomass completely. Vencaili® can be used in PLA, PBAT, PBS, PBSA, PHA etc., it can be used widely in blowing film, extrusion, injection molding, vacuum forming, 3D printing, e-cigarette, & etc.

Features and Advantages:
1. Customize to customer needs & choices of colors in black, white, red, yellow, blue, green, & silver.
2. Our ICP-OES tester can monitor the heavy metal content of biodegradable masterbatches;
3. Product certification process for our customers can be optimized with use of Vencaili ®;
4. Quality assurance with DIN-Geprüft & Seedling, Vencaili® can help your products to access the markets of China , European countries, & other regions.

Additive
Major products include:
1. UV stabilizer
2. Clarifying Agent (Clarifying agent in Latest news)
Homopolymer PP Clarifying Agent
A0003 is a Clarifying Agent that used in Homopolymer Polypropylene(PP), which can greatly improve the crystallization speed and structure of Homopolymer Polypropylene(PP).
Characteristics of A0003
- Improve Heat Deflection Temperature of Homopolymer
- Polypropylene (PP) to replace the High Heat polymer;
- Improve Transmittance;
- Improve Gloss and Product Appearance;
- Improve Impact Strength and Flexibility etc.

A0003 enhanced the properties of Homopolymer Polypropylene (PP) as follows: (with 2% of A0003 added)
Properties Testing Method Improved Ratio Light Transmittance ASTM D1003 +60%
Gloss ASTM D523 +8%
Heat Deflection Temperature ASTM 638 +30%
Tensile Strength ASTM 638 +16%
Flexural Strength ASTM D790 +25%
Izod Impact Strength (notched) ASTM D252 +20%

Homopolymer Polypropylene (PP)has a low price, high gloss, high flexibility but its low transmittance and low heat deflection temperature restrict its applications when using on the transparent and high heat products. In order to solve this problem, we decide to supply Homopolymer PP Clarifying Agent A0003. Clarifying Agent is in compliance with the regulations of FDA which is ideal for food contact applications.
3. Purging Agent (C1668 file)
C1668 Purging Agent
C1668 is a high molecular weight polymer based plasticised mineral purging agent that combines the benefits of the best three cleaning processes. Firstly, its expansible and foaming effects during melting state, allows all parts of screw and barrel being thoroughly cleaned. Its plasticised mineral brush up function can effectively clean up the screw and barrel without causing any harm. Thirdly, its extremely dissolving ingredients, can eliminate the attached plastic material, pigment and waste, thus minimizing the chance of erosion.

As C1668 can bring out the combined functions of the three cleaning processes, higher performance and better cost-effectiveness are therefore expected.
Special Characteristics:
- Increased Productivity - Since the dirt could be removed completely by using C1668, the number of times that the screw need to be clean is largely reduced, thus increasing the productivity.
- Reduced clearing cost - With its superior cleaning power, a few drops would be enough to get the screw fresh and clean, thus 60%-80% time can be saved comparing with those traditional methods.
- Reducing the occurrence of defects - Periodic use will prevent black spots occur, therefore less defects could be expected.
- Powerful performance - Its special ingredients will make the screw looks ever polished and new.
- Wide range of Applications - Well suit to use with numerous plastic resins, ABS, PS, PE, PP, TPE, PVC, PA, PBT, PC etc…
- Reliable and Secure - With its moderate hardness, the screw and the melting tub will be less likely damaged.
- User-friendly - Easy to control by following a step-by-step instruction.

Attention: When heated, the foaming properties of C1668 may force the plastics materials flow out from the injection gap, please be careful.
4. Anti-microbial Agent
5. Antistatic Agent
6. Mould Release Agent

For further information, please e-mail to: dg.marketing@nhh.com.hk