Calibrate your colorimeter so it can identify colors with precision. The white block calibrates your colorimeter because the machine measures all other colors according to their variance from true white. The four colored blocks are particularly helpful in quality control applications, where you want to make sure a specific color is consistent unit-to-unit. Made of ceramic, these plates won’t degrade, warp, or discolor over time, ensuring reliable measurements. Their surfaces are smooth and easy to clean, so they resist scratches that could affect readings. These plates are precisely manufactured to ISO/IEC 17025 standards for testing and calibration equipment.