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Old December 30th, 2011 -   #23 (permalink)
Lnfortun
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Default Re: problems with 3G Jet-Opaque transfer paper

Dye migration occurs when the dye molecules are heated at high temp and prolonged time to a point that the dye turn to gas state. While the molecules are in gas state they will bond to the molecules of synthetic materials. When cooled down the dye molecules return to solid state and permanently bonded to the synthetic material(sublimation). Although opaque material is not as receptive as 100% polyester synthetic, such as 100% or high percentage polyester shirt or 100% polyester coated material such as mug, it will have some form of sublimation effect(dye migration). So when splitting the time and lowering the temp when pressing opaque the dye molecules will not reach to gas state. Therefore minimizes the possibility of dye migration. Some vinyl transfers have some form of dye blocker to prevent dye migration.

I treat opaque material like vinyl transfer. I press between 320F to 330F for 6 seconds for first pressing. Let it cool down. Press 6 seconds for second presssing then peel cold.

Over heating or pressing too long can overcure the adhessive and lose it's bonding property. That is what happens when the edges are lifting.
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Last edited by Lnfortun; December 31st, 2011 at 12:00 PM..
 
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