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screen printing => Newbie => Topic started by: OhNoPrinting on April 07, 2024, 08:42:00 AM
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well, after I couldn´t get super reliable white with discharge, i switched to waterbased ink. Was a bit nervous about opacity, but: preflashed the shirt and first stroke already very nice white, then flash, print again. I flash again to take the shirt savely from the pallet to a drying rack and later to send them all in one go through the conveyor dryer.
I let the shirts go 2 times, each 160 degree C for around 1.20 min. After that I stretched it: cracking. Decided to send them two more times: this run with 180 degree C and 1.20min. still the ink cracks. Pressed them in a last effort with the heat press for 30 sec at 160 degree. still cracking. (did 99 sec on a test-shirt: still same outcome)
(http://oh-no-printing.de/oh_no_white_ink_crack.png)
I read that I can:
- overheat the ink (but after 2 runs in the dryer it was already cracking?)
- use too much ink?
- not getting the ink deep enough? (i already used a 43t and a lot of force)
Is there anything else I can try now? or is it learning experience and I have to do it again?
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The first thought in my mind is how STRONG are you stretching? Any ink will crack given enough force unless you have also used a stretch additive (not used that often but I have on girls stretchy shirts). I guess stretch the shirt close to or a little more than it would stretch when worn.
I'm sure there are others here to chime in with lots better answers but that was my first thought.
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well, after I couldn´t get super reliable white with discharge, i switched to waterbased ink. Was a bit nervous about opacity, but: preflashed the shirt and first stroke already very nice white, then flash, print again. I flash again to take the shirt savely from the pallet to a drying rack and later to send them all in one go through the conveyor dryer.
I let the shirts go 2 times, each 160 degree C for around 1.20 min. After that I stretched it: cracking. Decided to send them two more times: this run with 180 degree C and 1.20min. still the ink cracks. Pressed them in a last effort with the heat press for 30 sec at 160 degree. still cracking. (did 99 sec on a test-shirt: still same outcome)
([url]http://oh-no-printing.de/oh_no_white_ink_crack.png[/url])
I read that I can:
- overheat the ink (but after 2 runs in the dryer it was already cracking?)
- use too much ink?
- not getting the ink deep enough? (i already used a 43t and a lot of force)
Is there anything else I can try now? or is it learning experience and I have to do it again?
What ink are you using? Permaset?
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I guess normal wear is ok, but i don´t need to stretch too much to see these cracks..
The ink is from a local distributor - my guess is, he is rebranding it and it could be AMEX MANOUKIAN, but that is really just a guess and i don´t want to write, so i don´t bad mouth anybody because i can print :-)
Also the ink might just be old? I read, that waterbased ink gets funky?
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I guess normal wear is ok, but i don´t need to stretch too much to see these cracks..
The ink is from a local distributor - my guess is, he is rebranding it and it could be AMEX MANOUKIAN, but that is really just a guess and i don´t want to write, so i don´t bad mouth anybody because i can print :-)
Also the ink might just be old? I read, that waterbased ink gets funky?
There are Matsui whites that crack too when being stretched. really depends on how much you stretch. Permaset inks do easily crack.