We are offering optical brightener.Cotton - suitable for application with h2o2 bleaching. Neutral to bluish white shade. Paper & pulp-good for size press & coating. Flourescent brightening for silk & polyamide paper & pulp- good for coating & size press an excellent optical whitening agent for detergent industry. Cotton - suitable for application with h2o2 bleaching. Paper & pulp-good for size press & coating. Pink tone with tint colour.