| Show DISCOVERS NEW CHEMICAL RESISTANT chicago june 10 A dispatch 16 he tribune from acoria iff aya alias adelaide Sll ckel a teacher in the art department ot the polytechnic institute in an discover rediscover re madder printing hag lis covered a chemical resistant that when used on white duck with a atten died design makes possible in blue and white the resistant is applied with a brush through tho and the ma orrial thus designed with the resistant Is thrown in blue vat when removed the design Is clear there being ni evidence ot colomb the process is similar to zinc etching work |