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...biodegradable pure cotton drawstring bag COLOUR BLACK OR WHITE SIZE OEM certificated rohs reach About our factory Hongrui production line : our patents and ISO 9001 ,14001,45001 , BSCI certified . lab equipm...
...colour spectrometer from BYK 6801 to check delta E value and yellowness and whiteness Technical Specification Parameters Spectrophotometer NS800 Optical Geometry 45°/0 Inte-grating Sphere Size Φ58mm Measurin...