screen printing > Newbie
Noob askes question about water based ink
Homer:
--- Quote from: BartJY on July 13, 2019, 08:28:00 AM ---Frog,
Thank you for your patience. What I need are temperatures and duration for curing dry ink. For example: 250 degrees for 2 minutes. I'm aware that wet ink takes longer, but what about dry? No one seems to be able to provide me with that sort of information.
Once again thanks for your help.
Bart
--- End quote ---
because you're supposed to cure it while it's wet. what ink did you use?
Frog:
--- Quote from: Homer on July 13, 2019, 08:33:16 AM ---
--- Quote from: BartJY on July 13, 2019, 08:28:00 AM ---Frog,
Thank you for your patience. What I need are temperatures and duration for curing dry ink. For example: 250 degrees for 2 minutes. I'm aware that wet ink takes longer, but what about dry? No one seems to be able to provide me with that sort of information.
Once again thanks for your help.
Bart
--- End quote ---
because you're supposed to cure it while it's wet. what ink did you use?
--- End quote ---
Actually Homer, a trip through the interwebs on the subject of waterbase curung without a proper dryer reveals more than one reference to spreading shirts out open around the shop for air drying first, to remove the water vapor. Then, like with plastisol, it's down to bringing the ink layer up to cure temp, I think 300 or so generally, but could change with different inks.
Bart, it may be tough to find folks here with those specifics, as frankly, at a commercial level, this method is rare. You may need to experiment a bit to see at what height, at what temp, and for how long it will take. Your dryer could well be different than another.
Are the temp numbers on your dryer accurate for the surface of the panel? Or are you talking about the readings on the surface of the ink layer? Also, do you have a way of measuring these temps?
If I were you, I'd put the dryer panel four inches above a test shirt, and at whatever setting you have, note how long until it scorches.
Then back off a bit on another test shirt with a print, and do a wash test. Adjust as needed and document the differences.
Also, don't do this on the platens of your press, but rather a dedicated drying platen or table.
Colin:
Andy:
Please let me know if I will need to change this post below. I can copy paste the directly relevant part of the article I am linking
Bart:
I wrote this article recently about a shirt I did for one of our events. At the bottom there is a write up about the "how and why" you want to cure waterbase inks.
https://www.screenprinting.com/blogs/news/feed-your-brain-overview-of-screen-printing-event-design
Curing WB inks is all about the length of time at "cure temp".
Frog:
--- Quote from: Colin on July 13, 2019, 02:22:09 PM ---Andy:
Please let me know if I will need to change this post below. I can copy paste the directly relevant part of the article I am linking
Bart:
I wrote this article recently about a shirt I did for one of our events. At the bottom there is a write up about the "how and why" you want to cure waterbase inks.
https://www.screenprinting.com/blogs/news/feed-your-brain-overview-of-screen-printing-event-design
Curing WB inks is all about the length of time at "cure temp".
--- End quote ---
Good stuff, but our noob is especially hoping for some specific guidelines for optimal results with minimal equipment. He may be stuck with my suggestion.
Colin:
--- Quote from: Frog on July 13, 2019, 02:46:54 PM ---
--- Quote from: Colin on July 13, 2019, 02:22:09 PM ---Andy:
Please let me know if I will need to change this post below. I can copy paste the directly relevant part of the article I am linking
Bart:
I wrote this article recently about a shirt I did for one of our events. At the bottom there is a write up about the "how and why" you want to cure waterbase inks.
https://www.screenprinting.com/blogs/news/feed-your-brain-overview-of-screen-printing-event-design
Curing WB inks is all about the length of time at "cure temp".
--- End quote ---
Good stuff, but our noob is especially hoping for some specific guidelines for optimal results with minimal equipment. He may be stuck with my suggestion.
--- End quote ---
A heat press or iron is also a good option.
There are "air cure" catalysts also available on the market for future prints. Curing WB inks can be problematic without a good dryer and the correct additives :)
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