Przemysl Chemiczny, Vol.84, No.4, 264-266, 2005
Chemical destruction of cellulose fibers in the printing of textiles
(A) (46.54) polyester-Wscose white, (B) (50.50) polyamideviscose black, and (C) (88:8.4%) viscose-PA-Lycra white fabrics were printed with white burnout pastes by using guartype thickeners (Diagum A8, Prisulon DCA) and glycerol, 80 g/kg. At 160 g/kg paste, AI(2)(SO4)(3) etched satisfactorily the A and less so the B-fabric. At 140 g1kg, large openwork, but not precise and min. areas, were easy to etch. In the printed areas, Hunter's white Index of the A-fabric fell from 82.9 to 4151.8 at 160 degrees C, and to 21.6-43.5 at 170 degrees C (in 3-min. setting), at various paste compns. The thickeners gave permanent noncoagulating pastes. For the C-knits, each paste was unsaffsfactory and required as much AI(2)(SO4)(3) as 200 g/kg to promote carbonization of cellulose. A penetrant added to the paste and a suitable washing agent improved penetration of the paste and spalling of viscose degradation products.