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.

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.：
Grade 1：Complete fading.

Grade 2：Fair fading.

Grade 3：Fading.

Grade 4：Slight fading.

Grade 5：No fading at all.

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.

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.

○：No migration phenomenon.

╳：With significant migration phenomenon.

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.

╳：Could not pass the entire requirement of EN-71 standard.

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.

○：Under the controlled limit.

╳：Higher than the controlled limit.

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.

○：Under the controlled limit.

╳：Higher than the controlled limit.