The Pretreatment Process of UV Printing

UV printing is considered as universal, able to directly print on various material substrates. But do you know that when printing on metal, tiles, plastic, glass and such smooth-faced media, you need an extra process, that is pretreatment?

This blog will mainly introduce: what’s the function of pretreatment? How to pretreat media? Common-used pretreatment liquid.

These are difficult for new users, unable to understand in advance will easily cause a lot of trouble in operating machines. In serious cases, they may buy printers unsuited for their applications, which is a waste of money.

The Benefits of Pretreatment Process

When the substrate is metal, glass, acrylic, you need to pretreat the surface before print. The pretreatment process is wherever you’ll be able to create a number of the most noticeable gains in quality. Make ink toughly adhere to materials, enhance color performance and fastness.

  • Better print quality

If directly print on some smooth-faced, non-absorbent substrates, the finished print has bad quality, while perfect after the coating process. No matter the print is bent or folded or placed for a long time, the surface will not appear cracking, fault…

  • Instant drying speed

The pretreatment liquid is made of special chemical materials, which will be dried within 3 min after spraying, especially on the smooth materials such as glass, ceramic tiles, and metal.

  • Wear resistant and waterproof

The pretreatment liquid has adhesive ingredients. After pretreatment, the ink is superiorly touched on materials, the finished print is far more wear-resistant and waterproof than non-pretreatment print.

How to Pretreat Media?

Use a pretreatment liquid brush or electric spray gun to spray pretreat liquid on media surface.

Common-used Pretreatment Liquid

The pretreatment liquid are different. Not all materials need pretreatment process. Not all materials need the same pretreatment liquid.

Metallic Coating

Glass/Tiles Coating

Acrylic Coating

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