Use Sub Block to prevent dye migration.
Solutions™ Sub Block is a printable digital media for use with print/cut systems for heat transfer onto a variety of materials. It's designed specifically to prevent dye migration.

Available in: 19” width / 11 and 22 yard rolls
Recommended substrates: 100% cotton, 100% polyester, cotton/poly blends, Lycra, spandex, nylon, fleece, mesh, sublimated garments