(under subclass 101) Inventions directed to the removal or lightening of the shade or tone of a previously applied dye without complete removal of dyestuffs and artificial coloring matters from materials.
SEE OR SEARCH THIS CLASS, SUBCLASS:
102, for color stripping by discharging.
438+, 440, and 646, for extraction and recovery of dyes.
SEE OR SEARCH CLASS
162, Paper Making and Fiber Liberation,
4+, for processes of defibering waste paper or textile waste including the removal of color bodies, e.g., de-inking and repulping of newsprint.
