Printing with Blocks
Humans have been block printing with woodblocks for millennia, in fact, it’s the oldest known method of printing textiles. The ancient Egyptians, Greeks, and Romans all used woodblocks to print intricate patterns on fabric. Historians have found evidence of block printing in Egyptian paintings and in the writings of Herodotus and Pliny.
Along with using woodblocks to apply dye to fabrics, they were also used to apply mordant. According to Pliny, Egyptian dyers would use woodblocks to apply a variety of different mordants to a single piece of cloth. Each mordant would absorb a different color so when the cloth was put in the dye pot it would come out multi-colored.