In continuation from Part LXX the survey covers the action of sodium hypochlorite on cellulose, effect of pH on hypochlorite oxidation of cellulose, oxidation potential of the bleaching agent, concentration of sodium hypochlorite, time of contact; preparation of sodium hypo-chlorite (including electrolysis), materials for construction of elec-trolysers; the Mather & Platt electrolyser, calcium chloride/hypochlorite bleaching powders (structure and properties), preparation of bleaching powder solution, comparison of bleaching powder with sodium hypo-chlorite; the bleaching process, accelerated bleaching, souring, bleaching of colored woven goods, and grey chemicking. -- AATA