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。
