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Sublimation and vinyl are 2 different things. You will not have any issues with sublimation you might need to play a bit with heat and time depending on the shirts you get, when going with vinyl, keep in mind that any polyester does not like to be heated above 300 degrees. We use just standard Siser Easyweed on polyester and after working with the Siser techs we nailed it that we can press the easyweed on poly at 285 for 20 seconds with no issue and it doesn't come off. No need for special vinyls. We use the Easyweed and this technique on all the sports uniforms we do for numbers and names and have no issues at all.
 

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Discussion Starter · #3 ·
Sublimation and vinyl are 2 different things. You will not have any issues with sublimation you might need to play a bit with heat and time depending on the shirts you get, when going with vinyl, keep in mind that any polyester does not like to be heated above 300 degrees. We use just standard Siser Easyweed on polyester and after working with the Siser techs we nailed it that we can press the easyweed on poly at 285 for 20 seconds with no issue and it doesn't come off. No need for special vinyls. We use the Easyweed and this technique on all the sports uniforms we do for numbers and names and have no issues at all.
Interesting. I'll definitely try the 285 @ 20.

What is sub block for then if regular vinyl works?

Since this says it is a no bleed poly, I am wondering if you can use regular easyweed on it.

You seem to be doing it, but I have always used sub block vinyl on colored poly.
 

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Sub block is fine and is more user friendly. We use the Siser Easyweed on all colours and have no issues. One of the worse is white on a red shirt, for some reason players don't like pink numbers on their jerseys. We use the Easyweed pressed at 285 for 20 and have no issues at all. With any polyester the magic number is 300, you need to stay under that and you will not have any issues.

Also, when we press the vinyl on poly or even on 100% cotton, we always use a teflon sheet over the whole thing to avoid direct contact of the press to the garment. This also avoids shiny burn marks on the poly shirts.
 

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If you're looking at the Sport Tek posicharge shirts, you're not going to run into any issues using Siser Easyweed. The cationic dying makes it actually easier to work with than most regular 100% poly garments. The sub block material is for pressing onto sublimated garments, like camo patterns or garments that you've sublimated yourself.
 
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