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Model no. Chemical Name C.I. no.
1
 Fluorescent Whitener VBL Optical Brightener 85#
2
 Fluorescent Whitener 4BK Optical Brightener 113#
3
 Fluorescent Whitener CXT Optical Brightener 71#
4
 Fluorescent Whitener BBU Optical Brightener 220#
5
 Fluorescent Whitener ER Optical Brightener 199#
6
 Fluorescent Whitener EB 330 Optical Brightener 199#
7
 Fluorescent Whitener OB Optical Brightener 184#


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