Abstract:

Aiming at the problem of disperse dye black slurry on easy aggergation precipitation, taking 150% LB disperse dyes black slurry as raw material, explores the cause of the precipitation and the shade change of disperse dyes slurry after a long time rest. The results show that：after half a year，the top of the dye particles of 150% LB disperse black slurry more than eighty-five percent precipitate，the DC（Colourful Degrees Error） and DH（Hue Error） larger significantly，the similar shade turns into a brilliant red color；various reasons of the slurry precipitation and the shade change are analyzed，among them the diameter distribution unevenness is the main cause of the slurry precipitated easily，the paper present a plan which can suspend the precipitation rate of the disperse dyes slurry，that is “ diameter control method”，which can control the slurry’s diameter distribution effectively and solve the problem what is the aggregation precipitation of disperse dyes slurry at some level，expand the application prospect of liquid disperse dyes.

Key words: diameter analysis, disperse dye, slurry precipitation, shade