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Red ink leaving pigments on white ink after wash

 
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Old January 3rd, 2017 Jan 3, 2017 3:45:40 PM -   #1 (permalink)
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Default Red ink leaving pigments on white ink after wash

The red ink is coming off onto the white ink when washing. Ink used is is poly white, with red poly ink on top. Shirts are Sports grey 50/50 Gildan Dry Blend. The shirts pass the stretch test post curing and come out of the conveyor at around 375 with about 30 seconds of heat time. The same ink is used in the front of the shirt as well, but the adjacent color is navy, therefore the red did not get on any of the white in the front. The only reference I found online is “crocking”, red pigments migrating to the white ink. I also found that adding an extender base to red will fix this issue. I currently have about 80 shirts that are done and ready to be delivered to the customer, can I do anything to these to prevent this. What can I do in the future to prevent this from happening again. is this bad ink ?

the red and white are on 110 mesh.

pfpf white
pf red
navy
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Old January 4th, 2017 Jan 4, 2017 5:57:18 AM -   #2 (permalink)
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Default Re: Red ink leaving pigments on white ink after wash

Make sure when you're flashing your white that you're not getting the ink up to cure temp. Plastisol ink won't adhere to cured ink.
 
Old January 15th, 2017 Jan 15, 2017 11:24:34 PM -   #3 (permalink)
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Default Re: Red ink leaving pigments on white ink after wash

Agree with the above, that is most likely the problem
 
 
Old January 16th, 2017 Jan 16, 2017 6:38:20 AM -   #4 (permalink)
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Default Re: Red ink leaving pigments on white ink after wash

What poly ink are you using? Mine cures at 290-300. I would never run though my dryer to 375. Wouldn't that overcure them?
 
Old January 16th, 2017 Jan 16, 2017 7:01:11 AM -   #5 (permalink)
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Default Re: Red ink leaving pigments on white ink after wash

Quote:
Originally Posted by Viper Graphics
What poly ink are you using? Mine cures at 290-300. I would never run though my dryer to 375. Wouldn't that overcure them?
Your right my ink does cure at 290-300 as well. However I have a small conveyor and find that if the inks doesn't reach that 375 range upon exit, everything is undercurred. 375 on the surface may be the temp needed at my base. Any thoughts ?
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Old January 16th, 2017 Jan 16, 2017 8:02:09 AM -   #6 (permalink)
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Default Re: Red ink leaving pigments on white ink after wash

Quote:
Originally Posted by divers2deep
Your right my ink does cure at 290-300 as well. However I have a small conveyor and find that if the inks doesn't reach that 375 range upon exit, everything is undercurred. 375 on the surface may be the temp needed at my base. Any thoughts ?
OK...I'm confused When I run 100%poly shirts through my dryer the temp is set around 450 ish . I have the Vastex EconoRed1 with the infrared curing system and set about a 2.5 inch clearance in the chamber to belt. My temp gun reads at 295 -310 for only 6-10 seconds as it clears the chamber and I have never had a problem....on 50/50 and 100% cotton I adjust temp up accordingly to achieve cure temp.. If mine hit at surface 375 I'd be smoked out of the room and looking for a fire extinguisher (I think?) not going to try it to find out
 






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