The instrument is equipped with Ф8, Ф4mm double measurement caliber, used for traffic road signs, plastic and electronic, paint and ink, textile and garment dyeing and printing, ceramics and other industries accurate color measurement and quality control. Instrument built-in GB2893, GB/T18833 standard color, can be manually customized polygonal rectangular tolerance, a key to achieve the traffic road marking reflective film brightness factor, color coordinates measurement.