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Conveyor dryer discoloring shirt

 
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Old July 1st, 2009 Jul 1, 2009 7:46:17 PM -   #1 (permalink)
spx
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Default Conveyor dryer discoloring shirt

Obviously "heat" can have a detrimental effect on fabric. But how do you get around that with needing to dry Plastisol at 325 degrees?

We have an 8' conveyor dryer with and adjustable height heat element and an optional forced air fan. The height is set second from the top, approximately 12" up. We usually turn on the forced air fan as well. We monitor the "out" temperature of the goods with a non-contact digital thermometer gun. The ink is coming out at 320-325 and using the "stretch" test, it looks dried throughout.

We ran some Gildan 6.1oz bright red shirts. After they came out, they were more of a darker red. Holding them up to ones NOT run through, they definitely are a different shade.

I never noticed this before with other goods we have run but for some reason, this really stands out and I can't imagine that is right.

Is it?
 
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Old July 1st, 2009 Jul 1, 2009 7:54:43 PM -   #2 (permalink)
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Default Re: Conveyor dryer discoloring shirt

The red shirts will do not, from the heat. Once the shirts cool off you will see a different it will return to it's color. Don't weary.
 
Old July 1st, 2009 Jul 1, 2009 10:01:58 PM -   #3 (permalink)
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Default Re: Conveyor dryer discoloring shirt

Heh, I freaked and posted the same thing the first time I did red shirts. Like LaTonya says, it goes away.

For fun, spritz it with water and watch it come back instantly. I have still never been able to find why this happens, something weird with the red dye.
 
 
Old July 1st, 2009 Jul 1, 2009 11:05:38 PM -   #4 (permalink)
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Default Re: Conveyor dryer discoloring shirt

I also freaked my first time doing red shirts.
 
Old July 2nd, 2009 Jul 2, 2009 6:20:36 AM -   #5 (permalink)
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Default Re: Conveyor dryer discoloring shirt

WHEW!!! I can't wait till I get back to the shop now to compare it with an unprinted shirt!! There are so many screen printing "things" that people do differently (with success). It's nice to see agreement on something!!!

Thanks again, I can chaulk one more questionable thing off my list.
 






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