Show C Color 1 r F Fastness s' s Depends ds en Chemical Composition It Is a common fallacy that green lavender la or some other color Is less fast fust than blue or pink Fastness depends depends depends de de- de- de on the time chemical composition of ot the time dye u used ed not on the thc color states the United States Department of Agri AgrI- culture D Dyestuffs are grouped into Y classes cl nc according to their corn com position and the d dyes es In some classes are nrc more fast than those In others others Thus Taus a green blue or any other fabric mn may have re received Its color from any anyone one o of a number of ot different different different differ differ- ent d dyestuffs dyestuff's varying widely In per per per- r- r Without knowing Just what kind of a dye was used used and and it Is practically Impossible for the consumer consumer consumer con con- sumer sumer to tell this the this the fastness of or color In two fabrics cannot be pre pre- A dye that Is one of the poorest poorest poorest poor poor- est of ot its ts class may have been used on one of ot the fabrics while the other cr may have been dyed with one of the I best I |