Description: The Ancal white diffuse reflectance standards are high quality standards for white & color reference in acquiring reflectance spectra and in determining color space qualities.

They can be used as a standard white for color reference and for the calibration of optical instruments and photographic equipment. The reflectance material is of Albrillon™, a form of Halon which is accepted as the criterion white throughout the optical industry. The CDH-50 standard is nominally 50 mm diameter active area (dimension D). It comes in a black anodized aluminum sheath with a protective threaded cover. Each standard is guaranteed to have better than 97-½ % reflectance over 400 nm - 700 nm (color) range.

A CDH-50 is included with the spectrophotometric system for color reference