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UV DTF Printing

Hazy UV DTF Prints? The Problem Might Be Your Film!

by WongJim 29 May 2025 0 comments

Q: What is the "fogging" phenomenon?

"Fog" means that there is a layer of gray on the surface of the pattern, and the color is not bright, transparent, or vivid enough.

The specific manifestations are:

White ink turns gray after being used as primer, not pure white;

The colored area seems to have a layer of matte added, and the overall color is darker;

When exposed to light, the surface of the pattern reflects unevenly, as if there is a slight layer of oil mist.

Common Cause Analysis

1. The transparency of A film is insufficient or the atomization coating is uneven

This causes the overall pattern to be gray, affecting the color purity;

It affects the transmittance of the varnish layer, making it look "covered with a layer of white".

2. Poor compatibility of A film coating leads to uneven ink spreading

The ink "sticks" or "beads", forming uneven color blocks;

After printing, the UV-cured surface has a strong sense of particles and looks blurry.

3. The release force of film B is unstable, and the edge is fuzzy or partially residual after transfer

The pattern edges are not neat and slightly warped;

The pattern may be stretched and deformed during the film peeling process.

Of course, in addition to the membrane reasons, the common reasons include:

4. Misaligned Nozzle Angle or Ink Ejection Causes Image Blur

Skewed inkjet trajectory can lead to blurred edges or ghosting in the printed image;

White ink or varnish may appear fuzzy at the edges, and transparent areas may look grayish;

Common causes include printhead collisions, improper installation angle, or micro-particle clogging.

How to Judge the Quality of the Membrane?

These measured indicators:

Contrast of the pattern after printing: strong contrast between white and black, good light transmittance of the film;

The integrity of the layer after scratching: no virtual edges, no powder loss, no fogging;

UV light irradiation test: high-quality film absorbs heat evenly, does not deform, and does not emit fog;

Observe the color restoration after transfer: the quality of the film has a great influence on the terminal pattern restoration.

Our membranes have the following properties:

Highly transparent PET substrate, optimized coating formula to ensure clear and transparent patterns;

Stable surface tension ensures uniform adhesion of white ink and film formation of varnish;

The glossiness is over 95%, the color is saturated and there is no gray feeling;

Compatible with mainstream UV DTF models on the market, supporting simultaneous printing of varnish, white ink and color images.

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