The use and principle of the "simple household" standard light box source
The standard light source box is mainly used for visual assessment of color fastness of materials in textile, printing and dyeing, furniture decoration, toys and other industries, color matching, identification of color difference and fluorescent substances, etc., so that production, sample, quality inspection and acceptance are in the same standard light source. Underneath, accurately correct the color deviation of the goods, to ensure that the quality of the color of the goods meets the requirements, thereby improving the quality of the products.
Standard light source boxes are widely used in the color management fields of ink, printing, pigments, chemicals, textiles, toys, printing and dyeing, plastics, paints, leather, hardware, food, footwear and other industries.
The standard light source box is also called the standard light source color light box, the standard light source color box, the color light box, the color reference box, the visual color box and the like.
The main core part of the light box is the tube, which is a fluorescent tube made by a special coating process. Whether the quality of the lamp is good or not and whether the lamp can be used as a standard light source needs to determine whether it meets three technical requirements: color temperature, color rendering index, and brightness.
Color temperature: The most common indicator of the spectral quality of the source. The color temperature is defined by the absolute black body. When the radiation of the light source is exactly the same in the visible region and the absolute black body, the temperature of the black body is called the color temperature of the light source. (Unit; K, the higher the color temperature value, the more the color appears to be white-blue; the lower is biased to yellow-red.)
Color rendering index: used to measure the difference between the color of an object under natural light and the color it appears under the illumination of a certain light source (ie, the color of the object that appears under the illumination of a certain light source) The color of the object itself. Unit Ra)
Brightness: The light intensity per unit area.
Ordinary lamp life ends with the tube not shining. However, the standard light source lamp has a different internal structure than the ordinary lamp. When it is used for 2000 hours, the color temperature, color rendering index and brightness decrease. At this time, although the lamp can still be lit, it cannot be used as a standard light source.
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