Optical Brightener in Powder Form is extensively used in whitening of thermoplastic, polyvinyl chloride, polypropylene, polyester fibre, paint and ink. The Optical Brightener is available in slight greenish yellow powder form. The Optical Brightener can be melted at a temperature ranging from 200 Degree C ~202 Degree C. Optical Brightener in Powder Form is packed in 25 kgs fibre drum with two liners to suit specific requirement.