Changsha Lianda Chemical Co., Ltd.
Changsha Lianda Chemical Co., Ltd. Most Professional Optical Brightener Manufacturer In China
Quality Control
We have five main steps of QC process to ensure the goods quality before shipment at present,
*Melting Point Testing
By drying oven equipment to test the thermal endurance (Such as :OB≤ 220℃, OB-1≤ 300℃)
*Purity Testing
By liquid chromatography,for OB,OB-1,it should be ≥99%.
*Solubility Testing,
To make sure whether the material can dissolve it in organic solution or not,
*Appearance Color Detection,
it can be adjustable to the requirement.
*Color Light testing
By GC equipment, to ensure the finished products to be Red,Blue or White in color effect
Besides above tests ,we other testings,such as,Mesh testing for granular size; Ash testing for impurity etc.
