Offset Printing Ink - RiynPnt Material Co., Ltd.

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Your Premier Offset Printing Inks Manufacturer & Suppliers

Extraordinary gloss and strong lithographic performance make RiynPnt's offset inks the perfect companion for modern offset presses used in commercial printing. As a leading manufacturer of offset inks in China, RiynPnt offers a wide range of offset inks for printers, print buyers and brand owners.
With the continuous improvement of the printing process, the innovation of printing equipment, the complexity and variety of substrates, as well as the continuous improvement of environmental protection requirements in the printing industry, the market requirements for ink products are becoming more and more personalised, but green environmental protection and technological innovation are still the trend requirements of the market for inks. RiynPnt Ink has always been adhering to the green printing, technological innovation of the product research and development of the idea, with many years of accumulation of technological precipitation. RiynPnt ink has been adhering to the green printing, technological innovation product development ideas, with many years of technical accumulation, combined with the development needs of the market, and constantly launched products to lead the market demand.
RiynPnt offset inks have covered various printing fields such as commercial printing, booklet publishing, packaging printing, press publishing, etc. They are suitable for various printing materials such as coated paper, double-gummed paper, cardboard, matte paper, non-absorbent paper and special paper, etc., and are accompanied with a variety of ink additives and resistant inks, and at the same time, they can be customised to all kinds of spot-colour inks. The products meet the requirements of green ten ring certification, RoHS, EN71-3, REACH and other testing standards, and can meet the market demand in all aspects.

Product Type

Offset Commercial Ink

Sheetfed offset inks offer a premium quality gloss finish at low cost, using high-speed inks with faster drying time. These are ideal for printing items such as books, posters, catalogs, brochures, calendars, art books, danglers, lifestyle magazines, and movie posters.

Our sheetfed offset inks offer a vibrant color gamut with a broad color reproduction range and outstanding dot sharpness. Free of cobalt-based drying catalysts, our variants can also be deployed in adverse press conditions such as in high temperatures.

Offset Packaging Ink

RiynPnt brings you a superb range of offset packaging ink that provides unmatched print quality with excellent gloss and robust lithographic properties. Our range is ideal for printing solutions like food packaging cartons, mono cartons, rigid boxes, crockery boxes, footwear boxes, crockery, fruits, footwear.

Food Safety and Low Migration Solutions

RiynPnt offers food-safe and low-migration solutions for food, cosmetics, healthcare, pharmaceutical, and tobacco packaging. These inks have a low impact on the odor and taint of the foodstuff. They also comprise a low formation of hexanol and other odorous by-products. They are mineral-oil-free, drier-free, and don’t dry by oxidation.

Different grades of offset inks can be applied to these packages: books, newspapers, cosmetic boxes, PVC cards, UV cigarette packets, Metal printing.
As the leading offset printing ink brands suppliers, RiynPnt can provide full range of offset inks: Conventional offset process colors, Eco-friendly offset printing inks, Food grade offset inks, UV printing inks, Web inks, pantone inks, fluorescent inks, Metallic offset inks.......
In addition, we also offer a number of ink additives.

Product Applications

Packaging

Business

label

Books and Publications

Environmentally Friendly

Product Classification

Sheetfed Offset Inks

Competitive Price

Compared with purchasing from traders or distributors, it saves at least 30% of the cost and eliminates many intermediate links.
Fast Delivery

We have a wide stock of Offset Inks of different sizes and can deliver to you in 5-7 days. The delivery time will be 10-30 days for custom-made inks.
Guaranteed Quality

All RiynPnt offset inks cords are ISO, CE, ROHS, SONCAP, SGS compliant, product tested, andbacked by a 2 year warranty.
Successful Cases

The product sells well in 100 countries and regions including Southeast Asia, the Middle East, and South Africa.

Technical Support

Considering many distributor customers don't have enough offset printing knowledge, RiynPnt always provide great support by training, online technical consultation and physically technical visit, to instruct distributors and end users how to select a right printing ink for different printing jobs
RiynPnt also have professional and experienced sales and logistic teams, they can ensure printing ink orders performed 100% accorded with customers' requirement, and delivered to customers fast and safely. Especially for those customers who are new in printing industry, we will help them organize their orders in all aspects, including the offset printing inks portfolio and quantity, packaging, which ways is best and cost-efficient to deliver our offset inks to the customers......, so customers will feel it is free-trouble and easy to work with RiynPnt.

One-Stop Service

Through years of communication and cooperation with foreign customers, we have improved our product line completely. We can provide customers with one-stop product procurement services. These products cover all processes from preprinting, mid printing to post-press. We also welcome OEM and ODM orders, you can talk to our customer service center about your sourcing requirements, if you would like to select a product from our existing catalog or seek engineering assistance for your application.

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Certificates

In addition, we have obtained ISO, CE, ROHS, SONCAP, SGS certificates. Our product line Sells well in many countries and areas, such as Southeast Asia, Middle East, South Africa, and etc.

FAQ

Unstable Concentration

Phenomenon: The color is uneven during printing, and the concentration becomes darker or lighter when the machine is stopped and restarted.

Reason:

1. The pressure between the ink rollers is weak

2. Ink roller aging

3. Uneven supply of waterways

4. Ink has poor water resistance and is prone to emulsification, causing water to accumulate on the ink path

5. The adhesive layer on the surface of the rubber blanket is not suitable, and residual ink, spray powder, and paper wool accumulate, resulting in an uneven surface of the rubber blanket

6. Paper has poor moisture absorption, and water in non graphic parts is not absorbed when entering the next printing color group, resulting in poor ink application and unstable concentration
Network Reproduction - Expansion, Blurring

Phenomenon: The dots on the original sample and printed version cannot be accurately displayed on the printed sample, resulting in dot enlargement, dot undersizing, and dot blurring.

Reason:

1. Improper pressure setting between rollers, plates, and rubber blankets.

2. The ink is too soft and lacks sufficient viscoelasticity

3. Insufficient ink concentration and excessive ink application

4. Ink is prone to emulsification, and after emulsification, the ink tends to be soft and has insufficient viscoelasticity

5. The ink load in the ink roller is too large, with too much water and ink

6. Rubber blanket and roller are too soft

7. Excessive imprinting force

8. Insufficient sensitivity of the template and unclear publication
Mechanical Ghost Shadow

Phenomenon: Patterns that should not appear appear lightly on the ground or in shaded areas, such as previously printed patterns, inconsistent printing direction and density, etc

Reason:

1. The ink layer is too thin

2. Ink transparency is too high

3. The viscosity of the post printing ink is too high, causing the post printing pattern to overlap with the pre printing pattern. The pre printing pattern is then returned to the ink roller and rotated once, resulting in the pre printing pattern being printed on top

4. The ink on the rubber blanket is not cleaned thoroughly, and there are residues in the pre printed pattern.

5. The layout design is unreasonable, and there is a significant difference in ink consumption between the actual patterns in the left and right directions. The cross layout of large and shallow tones in the left and right directions results in significant density differences, causing image ghosting
Glossy Ghosting, Gas Ghosting

Phenomenon: In the solid pattern printed on the reverse side, there is an area where the gloss is significantly higher than that of other graphics and text, located opposite to the solid pattern printed on the front side.

Reason:

1. Large area, high ink volume on-site printing after surface printing

2. When printing on both sides, the oil absorption of the paper is overloaded

3. The amount of ink used for on-site printing on the reverse side is too large

4. After the front printing is completed, the ink should be printed immediately before it dries

5. The sample stack is tightly packed, and oxidation drying produces small molecule gas substances that cannot be released and accumulate in the middle of the sample.
Fading and Fading

Phenomenon: After printing, there is a color change or gradual fading of the printed material during storage.

Reason:

1. The connecting material components in the ink gradually oxidize and turn yellow, especially the varnish.

2. Poor UV resistance of ink

3. The acidity and alkalinity of paper do not match the acidity and alkalinity of ink

4. Excessive IPA addition during printing can cause some pigments to be intolerant to alcohol, resulting in color bleeding when printing dries.

5. Water based varnish and film coating. The alkali resistance and solvent resistance of pigments are poor.
Feimo

Phenomenon: Ink flies out of the ink roller in the form of atomized particles into the air, which is called flying ink; Flying in the form of large ink droplets near the ink roller is called ink slinging.

Reason:

1. Insufficient ink viscoelasticity

2. Low ink concentration, large ink volume

3. Excessive ink emulsification

4. Improper setting of printing pressure

5. The surface of the ink roller is damaged, resulting in poor ink transfer

6. Printing speed too high

7. The printing environment temperature and printing machinery temperature are too high, resulting in ink being too thin.

8. The printing layout is too narrow, and the ink on both ends of the ink roller is emulsified and accumulated for a long time, which fails to transfer and update, and is prone to ink splashing.

9. Static electricity generated during printing
Sticky Zhang

Phenomenon: The ink on the printing surface of the previous sample sticks to the stacking surface of the next sample, causing the graphics and text to become dirty. After being stacked high, the paper sticks together.

Reason:

1. Ink penetration and drying are too slow

2. Low ink concentration and large ink volume

3. Excessive ink emulsification leads to slow ink penetration and drying

4. Ink oxidation and slow drying of conjunctiva

5. In low humidity environments, thin paper printing generates static electricity, leading to paper adhesion.

6. Insufficient powder spraying or small particle size

7. The paper is heavy and stacked too high
Floating Dirt

Phenomenon: A faint color appears on the entire or part of the layout, and after confirming that the printing plate is not damaged, it will immediately reappear after wiping the layout clean.

Reason:

1. The ink body is too soft, and when the printing temperature is too high, it is easy to emulsify

2. Excessive addition of ink conditioner and viscosity reducer results in ink being too thin.

3. Pigments have strong hydrophilicity, and water-soluble pigments and dyes are used for offset printing.

4. Ink has poor water resistance, and during emulsification, the connecting material and pigment are easily separated, causing the pigment to enter the aqueous phase.

5. Excessive pressure between the ink collecting roller and the ink distributing roller causes separation of ink and water, resulting in floating dirt.

6. The surface of the ink roller has hardened, and the scraping effect of ink scattered in non graphic parts is not good.

7. The impact force of the water roller on the layout is too strong, and due to the existence of bite gaps, it causes jumping and the bite area is prone to getting dirty. Increasing the water volume may improve, but it may cause floating dirt.

8. Ink on water roller

9. Excessive water lifting of the dampening solution and excessive emulsification of the ink

10. The pH setting of the dampening solution may result in poor acid and alkali resistance of some pigments, making them easily dissolved by the dampening solution.

11. Surfactants and salts in paper dissolve into the dampening solution, disrupting the hydrophilicity of CTP plates.
Dirty Version

Phenomenon: Ink is applied to non graphic parts of the printed version.

Reason:

1. The surface tension of the dampening solution is too low, and there is insufficient water on non graphic parts

2. Crystallization by water roller, ink coating by water roller, insufficient water coating

3. Excessive printing pressure

4. The greasy nature of the ink is too high, spreading to non graphic areas

5. The ink body is too soft and prone to emulsification

6. The pH of the dampening solution is not suitable, and the conductivity is too high

7. The temperature of the ink roller is too high, causing the ink to become thin and prone to emulsification

8. The CTP version has insufficient exposure, and the non graphic parts have strong oil affinity. The sand particles in the version are small or shallow, and the water retention is poor.

9. Surfactants and salts in paper dissolve into the dampening solution, causing rusting.
Pull Paper, Pull Paper Wool

Phenomenon: During the printing process, the preceding ink and paper fibers on the print sample are pulled back by the subsequent rubber blanket, accumulating on the rubber blanket and CTP plate, and entering the ink path.

Reason

1. Excessive water content on the paper, high ink emulsification, significant decrease in viscosity when ink is transferred to the paper, and poor adhesion to the paper surface.

2. There is a lot of dust and paper powder on the surface of the paper.

3. Loose paper and low adhesive strength.

4. Printing speed too fast, ink viscosity increases too much

4. Excessive imprinting force makes it difficult to peel off the paper ink rubber blanket.

5. Ink viscosity is too high

6. Poor stability on the ink machine, fast increase in viscosity

7. The printing temperature is too low, the ink temperature on the ink roller is low, and the ink viscosity is high.

8. Low paper temperature in winter causes paper brittleness and low surface strength.

9. Improper selection of rubber blanket makes it difficult to peel off non graphic parts.

10. Improper selection of cleaning agents. The plasticizer in the rubber blanket is dissolved and carried away by the cleaning agent, and the solvent in the ink is absorbed by the rubber blanket during printing, resulting in significant thickening.
Poor Wear Resistance

Phenomenon: Easy to scratch during printing, and prone to scratching during sample storage and transportation.

Reason:

1. When high gloss is required for printing samples, the amount of wax added to the ink is low and the wear resistance is insufficient.

2. Paper absorbs ink quickly, causing ink powdering

3. Poor drying caused by ink and paper

4. The surface of the paper is uneven

5. The printing paper path is not cleaned thoroughly, resulting in ink blocks, paper hairs, and powder lumps protruding, causing scratches.

6. Flip printing before ink penetration is complete

7. The layout design is unreasonable. The shallow web design has a large format, thin and discontinuous ink film, and low film strength, especially for blue ink.
Powdering

Phenomenon: After the ink is transferred to the paper and dried, the pigment and substrate are not firmly bonded, and powdery substances are prone to fall off during friction.

Reason:

1. The capillary absorption of paper is high, and when ink penetrates, the connecting material is easily sucked into the paper together, resulting in exposed pigments.

2. The penetration speed of ink is too fast

3. High ink concentration and thin ink layer

4. The oxidation drying speed is too slow

5. The paper is too acidic, causing poor drying.

6. The pH of the dampening solution is too low

7. The ink is too soft, and after printing, the body and bones cannot be maintained

8. Excessive water supply of the lubricant, excessive emulsification of the ink, and separation of the binder and pigment.
Poor Drying

Phenomenon: After being left for a long time, the ink layer of the printed sample is in a wet state, touching the hands, and the ink layer has no strength.

Reason:

1. Excessive ink emulsification, insufficient water absorption of paper, and acidic salts in the dampening solution affect drying.

2. Printing ink volume is too high

3. The moisture content of the paper is too high

4. The acidity of the paper is too strong

5. Paper has low or no oil absorption.

6. Inaccurate parameter setting of lubricant solution

7. Insufficient oxygen in the stacking environment

8. The ambient temperature is too low and the relative humidity is too high

9. Excessive addition of ink conditioner, demulsifier, and anti caking agent to the ink

10. After being stored for more than 1 year, the desiccant of black ink is absorbed by carbon black, causing slow drying.
Poor Ink Quality

Phenomenon: The ink in the ink hopper is transferred less to the ink hopper roller or detached from the roller, resulting in a lower concentration of the printed sample.

Reason:

1. Insufficient ink in the ink bucket

2. Ink has high thixotropy

3. Poor ink flow

4. The ink in the ink fountain is mixed with water and emulsified.

Your Premier Offset Printing Inks Manufacturer & Suppliers

Product Type

Product Applications

Sheetfed Offset Inks

Why Choose RiynPnt Offset Inks

Technical Support

One-Stop Service

FAQ

Unstable Concentration

Network Reproduction - Expansion, Blurring

Mechanical Ghost Shadow

Glossy Ghosting, Gas Ghosting

Fading and Fading

Feimo

Sticky Zhang

Floating Dirt

Dirty Version

Pull Paper, Pull Paper Wool

Poor Wear Resistance

Powdering

Poor Drying

Poor Ink Quality

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