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See Chinese contents: GB/T 13531.7-2018 GB/T 13531.7-2018: General methods on determination of cosmetics -- Determination of refractive index
This Part of GB/T 13531 specifies the determination of refractive index for the liquid and semi-solid cosmetics. The first method of this Part is applicable to the determination of refractive index for the transparent liquid cosmetics. The second method of this Part is applicable to the determination of refractive index for the liquid or semi-solid cosmetics.
