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Old October 24th, 2018 -   #2 (permalink)
TABOB
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Default Re: DTG Ink is Fairly Easy To Scratch Off, Why? How Can I Fix This?

First of all you need to understand what the pretreatment does. It does not aid adhesion as some "experts" claim it does. On the contrary, what it does is preventing the ink from sinking into the fabric. Too much pretreatment and very little ink will cause the issue you are describing, as the ink cannot bind to the fibers. This is also why the issue is more common on white or light garments. The 30/70 ratio some recommend for white shirts is way too much. What you should be using is actually 2-3% pretreatment in 97-98% water.

Also, for very fine lines, do NOT use any pretreatment at all. If there is not enough ink to bleed, then pretreatment is not required. This is only for white/light color garments of course.

I hope this helps a little bit...