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1.Light Fastness |
Determined according to CEI 02-59: “Light Fastness” by exposure of prints to daylight and to the xenon lamp. Assessment is recorded in comparison with the ISO Blue Scale for textiles. Rating 8 denotes the best, 1 the poorest degree of fastness. | ||||||||||||||||||
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2.Acid Resistance |
Dipping printed sample in 5% hydrochloride solution at
room temperature for 30 min. Assessment is determined according to the
fading conditions of the test samples. It can be divided into five grades.： | ||||||||||||||||||
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3.Alkali Resistance |
Dipping printed samples in 2% caustic alkali solution at room temperature for 30 min. The assessment is determined in the same way as Acid Resistance. | ||||||||||||||||||
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4.Migration |
Placing the test sample between two pieces
of 40 phr PVC sheets and then clipping the test set by two pieces of glasses
(5cm square). The test set is pressed by 5kg iron and then placed into
the oven at 80℃ for 24 hours. | ||||||||||||||||||
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5.Heavy Metal Content |
According to the test method of EN-71, part 3:1994 standard. The sample is dipped into 0.07N HCl aqueous solution and vibrated at 37℃ for one hour. The filtrate is then analyzed by ICP (Induced Coupling Plasma). The controlled limited is shown as below:：
○：Has passed the entire requirement of EN-71
standard. | ||||||||||||||||||
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6.Analysis of Azo Dye |
According to German Bedarfsgegenstande-Verordnung
test method. The sample is digested in aqueous solution of sodium sulfite
at 70℃with citric acid buffer solution of pH 6. Then extracted with tert-butyl
methyl ether and detected by GC-MS. | ||||||||||||||||||
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7.Formalin Test |
According to the standard of DIN 53315, the
sample is dipped into pure water and vibrated at 40℃ for one hour. The
filtrate is then analyzed by HPLC with acetonitrile as eluent. |
