MR14891 Alcohol-Soluble Acrylic Resin | Solve Environmental Non-Compliance, Bronze Powder Blackening and Cracking & Ink Falling Pain Points of Tobacco Package Gravure Gold & Silver Ink

I. Application Scenarios

1. Applicable Products

Gravure gold and silver ink for tobacco package cardboard, alcohol-soluble gold mixing varnish, and bronzing base binder for tobacco labels, suitable for metallic texture printing ink of mid-to-high-end cigarette packaging boxes.

2. Applicable Working Conditions

High-speed rotary gravure printing, multi-color overprinting for tobacco packages, finished product die-cutting and creasing, lamination compounding, warehouse temperature-resistant storage and transportation, and strict solvent residue detection scenarios for tobacco packages.

3. Core Industry Pain Points

• Traditional benzene-soluble/high acid value alcohol-soluble resins cause excessive VOC and benzene solvent residues, failing to meet the environmental protection limits for tobacco packaging.
• Resins with high acid values tend to react with copper gold powder and aluminum silver powder, leading to blackening, loss of gloss, thickening and caking of ink during storage.
• The paint film is hard and brittle, easily causinglarge-area ink falling at creases and die-cutting positions of tobacco packages, with poor wear resistance and easy substrate exposure after wiping.
• Solid alcohol-soluble resins feature long dissolution time and low production efficiency, accompanied by pungent odor and high workshop environmental assessment pressure.
• Unstable adhesion on substrates such as coated cardboard, white cardboard and aluminum-plated paper, resulting in easy delamination of overprinted layers.
• Poor resistance to tobacco oil and daily chemical wiping, prone to gloss loss and gold peeling after long-term grease contact.

II. Core Technical Solution

1. Applicable Substrates

Tobacco package white cardboard, coated cardboard, matte paper, aluminum-plated composite paper, and special laminated base paper for tobacco labels; compatible with CAB and NC nitrocellulose systems.

2. Resin System

KDD® MR14891 Full Ethanol Synthesized Modified Thermoplastic Acrylic Resin. It is supplied in liquid form without secondary dissolution, with an acid value ＜1mgKOH/g and low-polarity molecular structure, perfectly compatible with metallic gold and silver pigments.

3. Drying Conditions (Compatible with High-Speed Gravure Rotary Production Lines)

• Oven drying (mainstream high-speed operation): 60℃ instant drying, matching the fast operation rhythm of gravure printing without plate sticking or trailing.
• Room temperature self-drying: Surface drying ≤8min, hard drying ≤6h, suitable for production lines without ovens or low-speed auxiliary lines.

4. Key Performances

• Flexibility: The paint film has moderate hardness and softness, with no cracks, no falling of gold and silver ink and no brittle peeling after 180° repeated folding and pressing.
• Adhesion: 100% film retention in cross-cut test, no peeling on various substrates, and excellent interlayer re-coating adhesion.
• Wear Resistance: Withstands more than 500 times of 4-pound wear test without substrate exposure, retaining complete metallic gloss.
• Medium Resistance: Outstanding tobacco oil resistance; no oil penetration, gloss loss or gold fading after long-term grease contact. No blistering or obvious changes after 24-hour water immersion, far exceeding the tolerance standards for tobacco package packaging.

III. Solution Comparison

IV. Conclusion and Selection Suggestions

1. Product Conclusion

KDD MR14891 is a special resin for high-speed rotary gravure gold and silver ink for tobacco packages. Relying on the full ethanol environmental protection system and ultra-low acid value, it fundamentally solves the two major problems of gold powder oxidation blackening and excessive solvent residue. Its low-temperature instant drying feature perfectly matches the fast-paced gravure printing production. With excellent tobacco oil resistance, high flexibility and high wear resistance, it fully adapts to the entire production process of tobacco packages. The liquid form eliminates the dissolution process of solid resins, balancing environmental compliance, printing quality and production efficiency. It is a high-quality upgraded product of traditional benzene-soluble and high-acid-value solid alcohol-soluble resins.

2. Selection Suggestions

• High-end export tobacco labels requiring strict solvent residue detection and high-gloss gold & silver ink: Use MR14891 alone as the main binder.
• Ordinary domestic tobacco packages with cost control requirements:Compound MR14891 with a small amount of low-acid-value CAB/NC to prepare gold mixing varnish.
• High-speed gravure printing with short ovens and fast operation speed: Priority to MR14891 for low-temperature instant drying to avoid plate sticking and ink trailing.
• Thick-coated solid gold & silver and multi-color overprinted cigarette boxes: Dilute with single alcohol solvent for uniform leveling without white spot defects.

V. Enterprise Strength Introduction

KDD  Functional Materials is a national high-tech enterprise, focusing on the R&D and application of alcohol-soluble environmentally friendly acrylic resins and special printing ink binders for tobacco packages. It has passed the ISO9001 quality management system certification and holds independent R&D patents for full ethanol synthetic resins.

With more than ten years of in-depth experience in the field of tobacco package printing resins, the enterprise owns a 10,000-ton compliant chemical production base, serving hundreds of tobacco label ink manufacturers and delivering a large number of mature application cases. It provides customized formula services and free on-machine proofing services according to customer needs, with stable batch supply, fully meeting the VOC limits and export packaging environmental protection detection standards of the tobacco industry.

VI. FAQ

1.Q: What is the compatibility of MR14891 with gold and silver powder? Will blackening occur during storage?

A: The product has anacid value ＜1 with mild molecular polarity, which will not corrode copper gold powder and aluminum silver powder. The prepared gold and silver ink has no blackening, thickening or gloss attenuation after 3 months of normal temperature storage, completely solving the gold powder oxidation problem caused by traditional resins.

2.Q: The resin takes ethanol as the sole solvent. Is absolute ethanol the only diluent? What about the printing leveling effect?

A: It can be diluted with absolute ethanol alone or mixed with a small amount of low-odor ester auxiliary solvents. The resin hasexcellent leveling performance, with no wire drawing during high-speed gravure printing, no pinholes or white spots on solid gold and silver surfaces, and low odor that meets workshop environmental protection requirements.

3.Q: Do existing solid alcohol-soluble gold and silver ink formulas require major process adjustments when switching to MR14891?

A: No major modifications are required. As a liquid finished product, it eliminates the heating dissolution and filtration steps of solid resins and simplifies the production process. Only fine adjustment of solvent ratio is needed for on-machine production, compatible with original printing equipment and oven conditions.

For complete gold & silver ink reference formulas, detailed technical parameters, free sample on-machine tests or customized gold mixing varnish formulas, feel free to contact us.