This is the paper to use for most non-oil lasers and copiers. Press shirt with heavy pressure. The pressing temperature should be a true 400-405 degrees F and the pressing time should be 12 to 15 seconds, wait 1.5 seconds and peel. A teflon sheet should be used to cover the transfer and shirt while pressing.
To further enhance the transfer after peeling, place a teflon sheet over the shirt and press 4-5 seconds, peel quickly.
It is recommended that you use the straight through path for your copier, see http://www.autoart.ca/DuraCotton_Heat_Transfer_Paper/Pressing_Tips_Tricks.html