Our Blacklight transfers appear white in daylight and glow brightly when under blacklight lighting. Our Blacklight transfers need to charge in sunlight, ideally, but incandescent light will work (just not as well). After charging in the sunlight, these transfers will glow brightly when in the dark. Our Blacklight transfers can be printed onto cotton, poly, & cotton/poly blend products at 375 degrees with medium-to-heavy pressure for 8-10 seconds and peeled hot. Our Blacklight Transfers glow-in-the-dark just like our GID transfers with a very soft hand. The biggest limitation of our Blacklight Transfers is that they are only available in white ink.