Ever Ray Leads UV Resin Innovation for Offset Ink Printing

By Guangdong Ever Ray Environmental Material Co., Ltd.

In offset printing, ink properties like tack, viscosity, and stickiness are carefully adjusted to ensure optimal performance and high-quality prints. Here’s why each of these factors matters and why different inks require variations:

1. Tack (Resistance to Splitting)

Tack refers to the adhesive quality or the resistance of ink to separate when rollers split it.

Why different tack levels?Multi-color printing requires varying tack levels to prevent ink trapping issues (where one ink layer pulls off another).

Too high a tack can cause picking (lifting of paper fibers).

Too low a tack can lead to poor transfer and weak colors.

2. Viscosity (Flow Resistance)

Viscosity measures how easily ink flows under force.

Why different viscosity levels?High-viscosity inks resist flow and help maintain sharp images.

Low-viscosity inks are needed for better coverage and smooth printing on certain substrates.

Different printing speeds and press types require varying viscosities.

3. Stickiness (Cohesion)

Stickiness is related to tack but focuses on how ink adheres to itself.

Why different stickiness levels?Helps control dot gain (how much ink spreads on paper).

Affects how ink transfers from roller to plate, plate to blanket, and blanket to paper.

Must be balanced to avoid misting (tiny ink droplets flying off at high speeds).

For offset printing , customer has different tack, viscosity, and stickinessviscosity requiered ,

Why These Properties requested ? To my opinon , different types of paper, printing speeds, and press conditions demand ink with tailored properties:

Coated paper → Lower tack to avoid picking.
Uncoated paper → Higher tack for better ink holdout.
Fast presses → Lower viscosity to improve flow.

Slow presses → Higher viscosity for controlled ink transfer.

By fine-tuning these properties, offset inks ensure smooth printing, sharp images, and durable results. 

But how to improved this properties ? From the UV resin base component and 

Guangdong Ever Ray Environmental Material Co., Ltd. supplies a variety of UV resins for offset printing, offering fast curing speed, excellent pigment wetting, superior flexibility, strong adhesion, and optimal ink balance. Additionally, we provide formula recommendations to help customers solve printing challenges effectively.

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