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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.

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Providing ideal top quality service for purple organic pigment for oil based ink items,we are professional manufacturer in China.Wining the majority of the crucial certifications of its sector,our service for purple organic pigment for oil based ink items are best sellers of your regional and international market. If you need extra info about our factory and item list,please click the button bellow to check for it.


We're suppliers of all kind of service for purple organic pigment for oil based ink moved in market place for terrific sales, we've service for purple organic pigment for oil based ink variety and specification's which will suit our customer's satisfaction. We have also attached service for purple organic pigment for oil based ink samples and other of our needs together with the above attached catalog sample.

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