['In', 'the', '19th', 'century', ',', 'textile', 'manufacturers', 'began', 'to', 'utilize', 'the', 'colour-doctor', ',', 'a', 'crucial', 'innovation', 'in', 'the', 'printing', 'process', '.', 'This', 'steel', 'roller', 'was', 'designed', 'to', 'abrade', 'the', 'surfaces', 'of', 'engraved', 'printing', 'rollers', ',', 'ensuring', 'that', 'they', 'retained', 'the', 'necessary', 'colour', 'during', 'operation', '.', 'The', 'blades', 'of', 'the', 'colour-doctor', 'effectively', 'cleared', 'the', 'printing', 'rollers', 'of', 'any', 'superfluous', 'colour', ',', 'enhancing', 'the', 'quality', 'of', 'the', 'printed', 'fabrics', '.', 'As', 'factories', 'expanded', ',', 'the', 'demand', 'for', 'efficient', 'textile', 'machinery', ',', 'including', 'the', 'colour-doctor', ',', 'increased', 'dramatically', ',', 'revolutionizing', 'the', 'industry', '.']
[[11, 11, 'Textile Machinery']]