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Discuss water base and discharge screen printing inks and curing methods. Share tips on getting the best results with the different ink manufacturers.



Is this a curing issue or an ink issue?

 
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Old March 2nd, 2016 Mar 2, 2016 5:47:58 AM -   #1 (permalink)
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Default Is this a curing issue or an ink issue?

Hey guys,

We printed these shirts yesterday on some Red Gildan 100% cotton shirts. They seemed fine until we took one home to run it through a wash to test the cure. The white discharge we are printing ended up washing out quite a bit, as you can see in the pic. I checked the first shirt coming out of the dryer and it was reaching full cure temp, but a bay door was opened halfway through the run, and I'm thinking that might've caused the dryer temp to change.

Another issue I was having while printing these shirts was the white ink gradually getting thicker and kind of chunking up. I did occasionally spray it down to try to keep the ink manageable, but by the end of the run it was kinda hard to work with. It did seem like I was laying down a nice solid white, though.

Do you think this is a curing issue or an ink issue? If we run these shirts back through the dryer can they still be saved?

Last edited by KennyB3000; March 10th, 2016 at 05:46 AM..
 
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Old March 3rd, 2016 Mar 3, 2016 11:22:49 AM -   #2 (permalink)
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Default Re: Is this a curing issue or an ink issue?

It does look like a curing issue. The photo seems to show that the ink is actually flaking off the garment. When we consider curing time & temp, what we truly care about is what temperature the ink gets to and how long it stays at that temp.

Yes, you should be able to run the garments through the dryer another 1-2 passes and better cure your garments.

Take one garment run it through the dryer again, cut off 1/2 of the print and label it. Run the other half through a 2nd time and label it. Toss both in the wash and see what happens.

You can also try a heat press at 300-330F for 30-60 seconds as a final cure.
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Old March 3rd, 2016 Mar 3, 2016 11:26:26 AM -   #3 (permalink)
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Default Re: Is this a curing issue or an ink issue?

Those are both great ideas. I'll give it a shot. Thanks!
 






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