A great alternative to Yudu brand transparencies that are essentially the same but more costly. Waterproof transparencies hold solid fields of ink better.Use only with inkjet printers. Inkjet transparencies are much better than laser transparencies because they hold tighter registration, as they do not get exposed to heat in the printing process. They also are more opaque in the black areas, and are not subject to the stray marks that accompany photocopying.Transparencies for screen printing should be printed on the rough / "grabby" side, and should read correctly when the ink is facing you.