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Heat Seal - Heat Press - Whatever you want to call it! => General Heat Seal => Topic started by: Maxie on July 28, 2022, 05:28:24 AM
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Is there any way to reduce or stop the marks you get on garments using a hear press.
Usually the edge of the platen shows.
I think it'll go away after washing but I'd like to deliver without marks.
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Mist some water on them when hot.
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Agreed. Most things I’ve heard of on this subject have to do with adding moisture and evaporating that moisture right after. It’s just smashed fibers causing the discolor.
Like you said, will go away after the wash, but people to see it and ask questions.
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If at all possible reduce your pressing pressure also
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We struggle with a lot of the polyester shirts. We thought DTF was going to be a game changer for polos. Cleaner logos, no puckering etc. But we cannot find a good enough poly polo that does not leave heat press marks. We tried washing, raft paper and even bought an expensive steam clean set up. Nothing works for the poly.
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The key on poly shirts is to reduce the pressure, there is no other options.
Given the heat @300 degrees and anything like medium pressure you are going to semi melt the poly fibers and flatten the thread profile. That is where the shine and silvery look comes from.
Try putting a pillow under the shirt we use a stack of sweatshirt material about 3/8 to 1/2 in thick and press at barely zero pressure.
The temperature at 300 is sufficient to soften the fibers and when over squeezed will flatten the fibers to some degree. That is where the visible shine comes from degrading the shape of the threads that are 100% PLASTIC.
TEST TEST TEST but this is what we have found you need to press as lightly as possible and the pillow helps distribute the what pressure there is evenly over the image.
mooseman
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The key on poly shirts is to reduce the pressure, there is no other options.
Given the heat @300 degrees and anything like medium pressure you are going to semi melt the poly fibers and flatten the thread profile. That is where the shine and silvery look comes from.
Try putting a pillow under the shirt we use a stack of sweatshirt material about 3/8 to 1/2 in thick and press at barely zero pressure.
The temperature at 300 is sufficient to soften the fibers and when over squeezed will flatten the fibers to some degree. That is where the visible shine comes from degrading the shape of the threads that are 100% PLASTIC.
TEST TEST TEST but this is what we have found you need to press as lightly as possible and the pillow helps distribute the what pressure there is evenly over the image.
mooseman
We bought a few different cover sheets from Stahls that they recommended none worked. We have tried lowering pressure as far as possible and lowering heat but we get to a point I really do not trust the adhesion, not enough to confidentially send out a thousand dollars worth of polos. I may approach it again because I really love the look of a nie DTF on a polo versus embroidery.
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in our experience there is no need to lower the heat just the pressure.
mooseman
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Thick sponge pad on press. Light pressure quick press on front to place transfer, turn inside out light pressure extend time from back.
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I have draped a soft towel over the platen and reduced this mark somewhat. For me, even worse than poly, are the rayon, modal, or triblends.
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We are doing mainly DTF and with too low a pressure I'm afraid they will wash off.
We lower the temp for poly.
Rubbing cotton shirts with a damp cloth helps.
From the feedback I see there is no magic solution.
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When I was doing wicking tees I used a Nomex pad. It's main use is for dye subbing hard goods. There's no hard edges and you can get them in a few sizes. Not cheap, but neither was tossing shirts.
It also doesn't compress over time like foam does.
https://dyetrans.com/details.php?item_no=NOM-121214 (https://dyetrans.com/details.php?item_no=NOM-121214) - Dyetrans.com