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The whitening effect of optical brightener agent could be estimated by visual method which better under the sunlight or measure by colorimeter. 3.light fastness there is no international standard for testing optical brightener lightfastness in plastics.most tests used din 54004 for reference.

(1) fluorescent brightenening agent vbl is a typical representative of bis(triazinylamino)stilbene derivative. (2) it can be soluble in 80 times soft water and shows anion character and the ph value resistant to acid and alkali is 6-11 and the expected ph value of dyeing bath is 8-9.

Factory supply fluorescent brightener vbl cas 12768-92-2 cas 28950-61-0 cas5089-22-5 cas 16470-24-9. ... chemicals raw materials optical brightening agent vbl 85 fluorescent brightener vbl 85 for cotton fabric. chongqing jinlinyuan environmental protection technology co., …

Alibaba offers 3,009 solvent base ink pigment products. about 46% of these are printing inks, 19% are pigment. a wide variety of solvent base ink pigment options are available to you, such as water based ink, titanium, and iron oxide.

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brown pigment for oil based ink supplier in Vietnam exporter from China, we're the most professional supplier from USA with ISO9001 Certification. Also the items have already been certified by mutiple safety certification.We'll offer our brown pigment for oil based ink supplier in Vietnam priducts in top-quality and most favourable value.

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