WE SUGGEST USING A HEAT PRESS FOR APPLICATION & PRESSING AT 325 DEGREES FOR 20 SECONDS and using Teflon as a cover for presses. For shirts and bags we recommend turning the garment inside out and pressing a 2nd time for full adhesion. For hats, we recommend using a hat press. We cannot guarantee your patches will match 100% from batch to batch or to the colors you see on your computer monitor. We do our very best to ensure all settings are repeated with each batch but please allow for some variances. WE ARE NOT RESPONSIBLE FOR ANY PRESSING ISSUES DUE TO INACCURATE TEMPERATURE OR PRESSURE.