Siser EasyWeed Sub Block ends Dye Migration
Get to know the garment you are decorating. Is it sublimated, patterned, or polyester? What if it’s all three?! Here, I am using a popular pick: an A4 Camo 2-Button Henley baseball shirt that is a patterned sublimated polyester. I see this type of shirt being used quite a bit in the apparel decoration world. I know the name says “camo,” but you can certainly see this shirt from a mile away.
I have talked one on one with a lot of customers that run into the issue you are seeing in the image below. This is referred to as the “migration issue”. What that means is the ink from the garment is trying to escape when heat hits it. This commonly happens with sublimated polyesters, but can sometimes happen with regular polyester garments.
A way to tell whether your garment is a sublimated polyester or a regular polyester- look on the inside of the garment and if it is white, and not the same as the outside of the shirt, then it is a sublimated polyester. Being able to identify a sublimated polyester versus a regular polyester is a good skill to have, but what if you don’t even know what sublimation is?
Well, I can help you answer that! Sublimation is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase So, when heat hits something that is sublimated the “solid” wants to turn back into a “gas” and escape. In this case the dye wants to leave the shirt when heat applying the heat transfer vinyl. If you aren’t using a material that will block that dye migration, then there is a good chance you are going to have results like you see on the left side of the image above. However, this impact is only noticeable when heat applying light colored heat transfer vinyl on darker polyesters.
A major contributing factor for the migration issue is high temperature and high pressure.
Here at Siser, we took this into consideration when we formulated one of the newest members of our EasyWeed family, EasyWeed Sub Block. With EasyWeed Sub Block, the temperature on your press is set at a low 265°F/130°C and a Medium setting for your pressure. EasyWeed™ Sub Block comes in two colors: White and Barcelona Yellow.
EasyWeed Sub Block is a cuttable HTV – if you’re looking for a product that has the same benefits but can be digitally printed, we have you covered!
Check out our Print and Cut material called ColorPrint™ Sublithin. ColorPrint Sublithin is formulated the same way as EasyWeed Sub Block (stops dye migration), but you can print full color images on it with your Solvent Printer like the image you see below.
If you do a lot of work with polyesters and are experiencing the migration issue with your current heat transfer vinyl, give EasyWeed Sub Block or ColorPrint Sublithin a chance to remedy your issue!