Yes, but it isnt safe for your health. Formaldehyde fumes are not what you want in your lungs. This is a waterbased ink so you need adequate conveyor driers with proper venting to print more than just samples.
Many folks are currently using Discharge ink as an underprint, lightly flashing the print to dry it enough to lay down plastisol on top, then drying it fully and finishing the discharge on the conveyer. I personally do not like this method since the discharge ink is almost invisible and registering an invisible ink means a LOT of misprints. The finished goods look good if you know what your doing, but i've seen as good a results using all plastisol so not a huge deal. No matter what anyone says discharge ink smells bad in use as its being cured. Even the 24 foot dryer we have with forced air makes little difference. IT STINKS! It will make you feel sick if you work with it for any length of time and so I don't recommend anyone use it on orders larger than say 200 pieces. (30 minutes of print time even done slowly) and then air out your floor.
We run this ink at the end of any day and leave the fans running for a couple of hours to clear the floor before we lock up at night.
I'm not sure about that but I do know that the ink formulations are better and that (like with Matsui's discharge) you don't need as much of the discharge agent as you did in the past. For this reason the amount of formaldehyde in the fumes is much lower that in the past.Many of the posts above make reference to formaldehyde fumes. It is my understanding that some of the ink companies are now using an alternative to formaldehyde that has less of an odor and is less corrosive.
This is how we do it. What is the other option. I have a riley hopkin joystick registration press. We generally print the darker color and line the other colors up to those registration marks. I could not think of any other way to do that.Just wanted to clarify your statement...a long time ago when I got in this business, thats how we were taught...print black, then set everything up to black. What a nightmare....just wanted to let folks know that isnt the way it should be done, and it sounded as if thats what you were suggesting to do. I haven't had a problem printing discharge underbases...once were registered, everything holds tight for production, so it hasnt been an issue at my shop.
There are some great discharge inks out that really work well.