During the precess of color identifying or matching, different light source, daylight or environment would cauld cause in correct recognizing upon color, with standard and objective light source, this apparatus provides precise control upon the idenification of the color of maerial or products 在产品的对色或配色上,不同的光源,照度或环境会使肉眼对色彩产生错误的判断,本仪器可提供标准客观的光源使得原料及产品颜色的对比,能有精确的控制。