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making sure Waterbased inks are cured with an IR conveyor

3.7K views 3 replies 3 participants last post by  tpitman  
#1 ·
Hi there,

I have an IR conveyor dryer (M&R economax II) - I've slowed the belt speed down - for waterbased I've been running them through 3 times at 390 degrees with the end gates up to let the moisture out (I don't want to scorch the fabric - it is very thin - with my heat gun it reaches 320 towards the end of the first run).

I'm finding that when I do a wash test a bit of colour comes out (eg, the water turns moderately green) - but the design still stays solid. I'm worried about the colour that is coming off - is it not cured? I don't want to put a product out there that will wash out ?

thanks!
 
#2 ·
A lot of times those temp readings on dryers are not super accurate. That being said, keep in mind you definitely need to hit a certain temp, but more importantly you do have to ensure you cook all that moisture out cause that is when the ink sets... You may consider trying to put those gates back down to keep more heat in the chamber. If you have a heat press, after it comes out of the conveyor, you could also consider throwing it in that thing for a few seconds. Try some different things, find the balance between scorching and a full cure, your results are best measured by that wash test... It is common for some pigments to wash out during the first wash, but you should not see the water change color noticeably, nor should the printed color on the shirt change at all...
 
#3 ·
Thanks for your reply! - I know the issue...sadly it was caused by my own experimentation - I had some random leftover WB pigments on hand and I really wanted to play with colours - I added them to a white ink to see what would happen - I just tested all my WB colours on 1 shirt this morning and the pigmented ones were the only problem ones. All my true colours were fine. Nothing lost but a bit of time. But I learned a lesson.

Cheers!
 
#4 ·
I've got a crappy dryer, and I measure the belt speed by timing a shirt before hand to make sure it stays in the dryer for at least 90 seconds. I also have to drop the temperature knob down to avoid scorching. From what I've read it's more important to have the shirt and ink at a temp of about 320 for the 90 seconds, rather than less time at a higher temp. Low and slow . . . you're baking it, not broiling it. Sucks with a small dryer, but it's doable.

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