GB 31604.7-2023 Translated English of Chinese Standard (GB 31604.7-2023, GB31604.7-2023): National food safety standard - Food contact materials and products - Decolorization test [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]https://www.chinesestandard.net, 2024. 2. 21. - 11페이지 This standard specifies the test methods for discoloration of plastic materials and products used in food contact. This standard is applicable to the determination of soak solution coloring and wipe decolorization of food-contact plastic materials and products with colorants. |
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9-step chromatic transference alternative solvent obtained assessed grade assessing staining batch of samples blank absorbent cotton blank soak solution chemical alternative solvents chromatic transference scale cm×2 cm coconut oil color assessment booth color difference colorimetric tube rack coloring and wipe Coloring grade assessment corresponding number corresponding product standards cotton after wiping decolorization test result electronic balance ethanol evaluate the grey Figure A.1 fingers index finger food simulant mass display materials and products migration test moistened absorbent cotton parallel samples person shall rest press the moistened represented as negative represented as positive requirements of GB/T result is grade result is represented results of parallel sample soak solutions scale for assessing scale or 9-step sensitivity is 0.1 simulants or chemical soak solution coloring solution coloring test transference scale grade tube with stopper typical grey scale Vegetable oil visual difference wipe decolorization grade wipe decolorization test wiping absorbent cotton wiping force value