I have a customer that wants me to cover up their existing printed logo with their new 3 color logo (cover up) on 600 denier nylon bags. Will there be a curing issue and will the new print attach to the existing inks? open for suggestions
looking forward to see how this board works
Matt
The board works fine. Since the bags won't be washed as much as a t-shirt, it shouldn't be a problem as far as adhesion goes. I would worry about seeing the other logo through the print though.
You can always try one and see how it works, maybe print one of the bags with another logo that you have setup already to get an idea of what you are looking at and also to test the longevity through wash and wear.
I have the same question, Someone dropped off 100 shirts that have a small ink design on the left brest that needs to be covered with new design. I was told or read somewhere that the ink will not attach to the old ink well and would peel off after a few washes.
I've played with this a few times, and all I can say is--maybe.
Do it on one, cure it, and abuse it a little. I have overprinted some that stuck, some that kind of stuck, and some that flake off just by scrunching up the fabric.
I agree with screenfoo it's a 50/50 chance. 1 thing I found was that running through the dryer twice with a 30 sec break seems to make the adhere better. I had to to redo 50 shirts because a customer gave me the wrong number. I ran 1 though once and 1 through twice. Both passed the strech test but on a 3rd washing there was a few spots that had come off not real noticeable but overtime may start to look bad overtime. It was only were the old ink was. The other shirt I still have and wear and is several months old and has no issue and the customer hasn't called about any problems. I did ask them to call if there was they were in the understanding that there could be.
Speaking of, if you try this, make sure you really heat up the garment--if you cure it at the same temp/speed as you do a normal print, you may not heat the new deposit well enough with the underprint sinking more heat than the shirt. That's the other problem with this--you get the overprinted part hot enough to cure, you could be at remelt on the other parts of the design. Perhaps those with gas dryers or serious forced air IR dryers have better luck with this...
Printing over existing cured pastisol ink 
