PROPERTIES OF OPTICAL BRIGHTENERS(3/4)

3 – WASHING FASTNESS:

The washing fastness rating of fluorescent brighteners if about 3. The fair washing fastness of fluorescent brighteners is due to partly to their lack of substantively of textile material and their gradual degradation by exposure to sunlight. The fair washing fastness may not be noticeable in cellulose because of the presence OBAs in domestic detergents when fluorescent are used on other fibers they are applied in the manufacturing situation and brighteners are chosen which will last the expected life of the textile article.