I’ve started using discharge ink to do white on black with a nice soft feel. Discharge ink is relatively new for screenprinting and can give nice full white coverage on a black or dark colored shirt without the heavy bulletproof feel of plastisol. Even water based super opague white ink will leave a heavy coat of ink and inconsistent coverage on blacks or darks.

Discharge ink does this by literally blocking the color spectrum from the garment. As far as I understand it, discharge ink doesn’t bleach the fibers which would weaken them and it doesn’t dye them like water based does, it literally bounces the color spectrum from the shirt. Sounds awesome huh? It has to be heat cured and a conveyor dryer won’t work.

So you have to print and lay them flat like you would with water based and then cure them by hand with a heat gun. Some conveyor dryers will work but not all have the options necessary for proper curing. Your home oven can work ok too.

You can tell the ink is cured as it will change color, just be careful you don’t scorch the shirt. This can be time consuming to do by hand so it’s recommended to use discharge in small print runs to keep the shirts from drying while you try to get them all cured. The best thing is after you give it an initial wash, it has a soft feel and you can’t even feel it on the garment.
Now the downside, discharge ink needs to mixed with an activating agent and the ink is gooey and sticky not to mention stinky. Once the agent and ink are mixed you only have about 4 hours of active time to print with. So you need to mix every time you print, there’s bad fumes too. You’ll need a well ventilated area to print in, it’s similar to vinyl ink that way. You can’t really claim eco-friendly if your using discharge, but if you need good white coverage on a dark without the heavy feel you can’t beat it.

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