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Discuss the different plastisol screen printing inks and curing methods on the market. Share tips on getting the best results with the different ink manufacturers.



Not able to clear Ink on polyester garment

 
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Old February 3rd, 2013 Feb 3, 2013 12:21:53 PM -   #1 (permalink)
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Default Not able to clear Ink on polyester garment

Garment is Black 100% Polyester San Mar performance shirt. Printing white Ink International Coating 741. I have stirred ink & added some reducer but it is still too thick & sticking to screen. Have to push very, very hard numerous hits to get ink to clear screen.
Using a Push stroke. Feel I am driving ink too much into garment. I am not flashing after all the hits I made I feel I am getting sufficient coverage. Watching the heat carefully in the dryer. Checked shirts after 24 hours & so far no dye migration.

Very tiring & slow printing this way. Any suggestions would be gratly appreciated.?
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Old February 4th, 2013 Feb 4, 2013 6:48:47 AM -   #2 (permalink)
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Default Re: Not able to clear Ink on polyester garment

What's screen mesh size are you using?
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Old February 4th, 2013 Feb 4, 2013 2:19:33 PM -   #3 (permalink)
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Default Re: Not able to clear Ink on polyester garment

yea what mesh are you using ? I've printed through a 156 straight out of the bucket with no problems.

edit. not sure if its the same ink ? I think I may have 7100 series ink from Ryonet it's there poly ink ?
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Old February 4th, 2013 Feb 4, 2013 2:53:59 PM -   #4 (permalink)
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Default Re: Not able to clear Ink on polyester garment

How are you curing it? Polyester requires less heat to cure. If ink is sticking you're flashing to long and with high ink. If your flash doesn't have temp control, reduce the time you flash.

If you're using your flash to cure, reduce the time you're curing with the flash. Do you have one station? Sounds like your platen is getting too hot, and drying the ink in the screen.
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Old February 5th, 2013 Feb 5, 2013 5:32:06 AM -   #5 (permalink)
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Default Re: Not able to clear Ink on polyester garment

I am using 110 Mesh. I was afraid the screen might not have been tight enough. I don't have a tensionmeter. I am using diamond chase retensionable screens.
Job was for 60 pieces front & back prints. After strugging through one side of the job I brought the ink home for the weekend to keep it warm. (Shop goes down to about 63 degrees at night) Stirred Ink by hand before printing.

Made screen for the back print of this job. I chose a new screen felt very tight before choosing it. The new screen for the back design printed fine without problems. I printed just a few shirts with the new screen & decided to retest the screen that had been giving me the clearing prblems as I had to replace one shirt that had gone bad when I couldn't clear the ink. Lo & behold it printed fine when I loaded the screen with the ink that had been at home warm all weekend.

Don't know for sure but i will be keeping my ink warmer & stirring for atleast 5 minutes before printing with lo bleed poly ink.
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Twillie
 
Old February 5th, 2013 Feb 5, 2013 1:09:32 PM -   #6 (permalink)
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Default Re: Not able to clear Ink on polyester garment

Correct white ink usually has to be warm. I didn't see what colors you're using.

63 degrees isn't that cold though.
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Old February 5th, 2013 Feb 5, 2013 2:49:59 PM -   #7 (permalink)
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Default Re: Not able to clear Ink on polyester garment

Quote:
Originally Posted by selanac
Correct white ink usually has to be warm. I didn't see what colors you're using.

63 degrees isn't that cold though.


This was my thought.



I would recommend getting a paint stir attachment for a drill. Use this to activate your ink as it is thixotropic it will become less viscose and print much easier. Other things to consider, apart from screen tension, would be off contact, enough spray tack to keep the shirt from lifting, and keep in mind if you print flash printing, give the garment adequate time to cool down to avoid tacking.
 
Old February 8th, 2013 Feb 8, 2013 6:37:45 AM -   #8 (permalink)
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Default Re: Not able to clear Ink on polyester garment

Hey Twillie, All are great suggestions - The 7100 series was brought up and I recommend it highly. The 7113 white and all the 7100 series are designed to cure at 285 and are made specifically for 100 poly performance wear. Message me and I can send you a sample of the white and the tech sheet

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Old February 8th, 2013 Feb 8, 2013 7:17:00 AM -   #9 (permalink)
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Default Re: Not able to clear Ink on polyester garment

If you are looking for a different ink for polyester garments I highly recommend Smart White from ONE STROKE. This is a creamy easy printing plastisol (cures at 320). It is truly superb! Call Dave Wilson at ONE STROKE ( 800-942-4447 ) and tell him David Higgins referred you; he will gladly send you a free sample of this amazing white. It is also great on 50/50 100 percent cotton and can be used on nylon with out a catalyst as long as the nylon is not treated with a water repellent, in which case, you will need a nylon bonding catalyst at 10-15% by weight.
 






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