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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.

China optical whitening agentselect 2020 optical whitening agent products from verified china optical whitening agent manufacturers, suppliers on made-in-china.

Good whitening effect on cotton fabric even under strong alkalic or acidic conditions. optical brightener cf-90: c.i.134 whitening agent for cotton: optical brightener ms: c.i.353 (liquid) mainly used as whitening of cotton and linen, silk, polyamide fiber, wool and paper. optical brightener 4bk 27344-41-8: whitening agent for cotton fabric.

Offering very best excellent export 351 fluorescent brightener for fiber items,we are specialist manufacturer in China.Wining the majority of the critical certifications of its business,our export 351 fluorescent brightener for fiber items are most effective sellers on the nearby and international market. When you need to have a lot more information about our factory and product list,please click the button bellow to check for it.


Our corporation mostly engaged and export export 351 fluorescent brightener for fiber. we rely on sturdy technical force and constantly create sophisticated technology to meet the demand of export 351 fluorescent brightener for fiber consumers. We are sincerely welcome close friends from different circles at residence and abroad come to cooperate!

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