What is water-based varnish?

Date: Aug 27 2024 From: Star Color

In today's global context of increasing environmental awareness, the printing industry is also facing environmental challenges.

Consumer demand for green packaging and environmentally friendly products continues to grow, and traditional solvent-based glazing materials are gradually restricted due to their high VOC (volatile organic compounds) emissions.

In this context, water-based varnish, as an environmentally friendly glazing material, is gradually replacing traditional solvent-based varnishes with its environmental advantages.

The basic concept of water-based varnish
Water-based varnish is an environmentally friendly glazing material made of water as the main solvent, supplemented by a small amount of organic solvents such as ethanol, and added with film-forming resins, additives and other ingredients.

Its biggest feature is that it is non-toxic, odorless, and has no VOC emissions, which fully meets modern environmental protection requirements. Water-based varnish forms a transparent, bright film on the surface of printed products, which not only enhances the visual effect of printed products, but also enhances their wear resistance, folding resistance and chemical resistance.

What is water-based varnish?

Application areas of water-based varnish

Package printing : In the packaging printing of sensitive industries such as food, medicine, and cosmetics, water-based varnish is favored due to its non-toxic and harmless properties. It can not only effectively protect the product from external pollution, but also improve the beauty and texture of the packaging.

Books and magazines : The application of water-based varnish on printed materials such as book covers, color picture books, and magazine covers can significantly improve their gloss and wear resistance, extend their service life, and bring readers a more comfortable reading experience.

Commercial printing : In commercial printed materials such as posters, flyers, and business cards, water-based varnish can enhance the visual effect of the printed materials and also play a protective role, especially for outdoor posters. The transparent varnish on the surface can block ultraviolet rays and delay the fading of the posters.

Precautions for using water-based varnish

Viscosity control : During the coating process, the viscosity and solid content of the varnish must be strictly controlled to ensure a uniform and smooth coating.

Paper selection : Different papers have different absorbency and adaptability to water-based varnish, so it is necessary to select appropriate varnishing process and parameters according to the paper type.

Control of coating amount : Too much coating will lead to slower drying speed and reduced glossiness; too little coating will affect the protective effect and aesthetics. Therefore, the coating amount needs to be precisely controlled according to actual needs.

Drying conditions : Drying conditions are crucial to the drying effect of water-based varnish. Appropriate drying methods and parameters should be selected according to specific processes and equipment to ensure that the coating dries quickly and evenly.

Conclusion and Outlook
In summary, as one of the important materials for green printing, water-based varnish plays an important role in improving the quality of printed products and protecting the ecological environment.

With the continuous improvement of environmental awareness and the continuous advancement of technology, the application scope of water-based varnish will become more and more extensive, and its position in the printing industry will become increasingly important.

What is water-based varnish?

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