This Optical Brightening Agent both have powder and bead.It's both can used in Paper Industry

Optical Brightening Agent BA(C.I.113)  (fluorescent brightener,Optical brightener)

Chemical name	Stilbene derivative
Structural formula
Specification	Appearance: Yellow powder Fluorescent Color: Similar to the standard sample Whitening strength: 100±3( compared with standard sample) Moisture: ≤6% Ionic character anionic
Treating process:	1.exhausting whitening process:        BA: 0.05-0.3% (o.w.f.), bath ratio: 1:5-30, dyeing temperature: 40°C -100°C;        Na2SO4:0-10g/l.,start temperature :30°C , heating rate:1-2°C /min, keep the        temperature at 50-100 for 20-40min, then lower to 50-30°C --> wash-->        dry( 100°C ) --> setting (120°C -150°C )×1-2 min( add proper amount        leveling agent according to the leveling effect). 2. Padding Process:        BA:0.5-3g/l, residue liquor ratio:100%, one dip and nip --> dry( 100°C )        -->setting (120°C -150°C )×1-2 min
Use:	Mainly be used as brightener of cotton, linen, silk, polyamide fiber ,wool and paper.
Package:	It is packed in 20Kgs paper board bucket..It can be packed according to the requirement of the user.

Note: It needs to be declared that the above data is based on our present knowledge and experience; owing to too many affecting factors, these data cannot be free from their check and test when processing and using the product.