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Great prints looking terrible after pressing

 
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Old September 21st, 2015 Sep 21, 2015 12:19:25 AM -   #1 (permalink)
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Default Great prints looking terrible after pressing

I have run into a problem when printing black garments. The white and colors look perfect - vibrant, bright whites, etc.. but then after using the heat press they look terrible. The whites lose brightness, and all colors look dull.

I know that the heat press pressure can play a role in this, and the less pressure I use the better they look but even at the LEAST amount of pressure possible they are still losing vibrance. Especially with sweatshirts, as they are much thicker.

I am using epson pre-treatment diluted 1-1. I press the shirts with high pressure right before printing, then use light pressure for 90 seconds at 339 degrees after printing. I've tried both kraft paper & parchment paper and it doesn't seem to make a difference.

I am using this heat press: Model 228 | Heat Press Machines | Insta Graphic Systems Products | Insta Graphic Systems

Are there any other factors I'm not considering that contributes to dull prints? I'm willing to try anything at this point!

Thanks in advance
 
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Old September 21st, 2015 Sep 21, 2015 5:04:08 AM -   #2 (permalink)
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Default Re: Great prints looking terrible after pressing

Heat plays a factor in how the prints look I would confirm with a temp gun that you are not drying the images at to high a heat. Also it seems to help for vibrancy I have noticed if you hover for a min or so before pressing (not sure if your doing it that way or not) Most presses can have a +/- of 10 degrees (or more) despite what the readout says.
 
Old September 21st, 2015 Sep 21, 2015 5:17:19 AM -   #3 (permalink)
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Default Re: Great prints looking terrible after pressing

Quote:
Originally Posted by aaronseminoff
I have run into a problem when printing black garments. The white and colors look perfect - vibrant, bright whites, etc.. but then after using the heat press they look terrible. The whites lose brightness, and all colors look dull.

I know that the heat press pressure can play a role in this, and the less pressure I use the better they look but even at the LEAST amount of pressure possible they are still losing vibrance. Especially with sweatshirts, as they are much thicker.

I am using epson pre-treatment diluted 1-1. I press the shirts with high pressure right before printing, then use light pressure for 90 seconds at 339 degrees after printing. I've tried both kraft paper & parchment paper and it doesn't seem to make a difference.

I am using this heat press: Model 228 | Heat Press Machines | Insta Graphic Systems Products | Insta Graphic Systems

Are there any other factors I'm not considering that contributes to dull prints? I'm willing to try anything at this point!

Thanks in advance

Could be several factors. The right heat press temperature is important, as noted. After you pretreat, how are you heat pressing the garment? Are you using a cover sheet? When you lift off the cover sheet is it gliding off or do you have to tug at it to come off. If you are tugging then the pretreat has not dried enough and when you tug it off you are also pulling a layer of pretreatment off.

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Old September 21st, 2015 Sep 21, 2015 6:03:10 AM -   #4 (permalink)
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Default Re: Great prints looking terrible after pressing

Sounds like a pretreat and temperature issue. Also what type of shirts are you using, after pretreating are you laying the fibers in the same direction before pressing, if not when you press after printing the ink is dispersing.
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Old September 21st, 2015 Sep 21, 2015 8:23:25 AM -   #5 (permalink)
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Default Re: Great prints looking terrible after pressing

Sound like you have a dye migration problem caused by the garment having a significant ammount of polyester.
 






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