Proper Use Of Standard Light Source For Color Light Boxes

< p > < a > href= > //www.sjfzxm.com > > correct use of color lamp box < /a > /p >

< p > 1. angle of observation < /p >

< p > below are all the standard facilities for coloured light boxes, and the observation angle will directly affect the results of the assessment.

According to international standards, only two kinds of observation angles can be used. They are: < /p >

P > A, zero light source, 45 degree observation (0 degree -45 degree), that is, the light source is illuminated from the zero (vertical) angle of incidence on the sample, and the observer looks at the sample from 45 degrees.

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< p > b, light source, 45 degree inclined platform < /p >

< p > 45 degree light source, zero degree observation (0 degree -45 degree). In this layout, 45 degrees of oblique platform (45 degree Fixed angle table) should be used to irradiate the light source from the 45 degree on the sample, and the observer will observe the sample from zero (vertical).

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< p > 2.45 degrees. The location of the sample is < /p >.

< p > no matter using any of the above observation methods, we must pay attention to detecting samples as far as possible in the middle of the lamp box, so as to reduce the influence of external light sources.

In addition, the most important thing is to compare the color of two or more objects, and try not to overlap them.

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< p > 3. lamp box maintenance < /p >

< p > a perfect maintenance plan to ensure your lamp box is in a standard state for a long time: be careful when using it, do not contaminate the inner wall of the lamp box; if it is found that there are stains or paint stripped, you should immediately send personnel to revise or replace the inner panel, and check the usage or brightness of the lamp regularly.

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< p > 4. requirements for environmental factors in the execution of color time < /p >

< p > all the external rays that will have the opportunity to shine on the sample should be avoided as far as possible, such as windows in the field of vision, and gray shades should be installed to cover them, so the use of the coloured light boxes in the black rooms is the most ideal.

Another thing that is often overlooked is that we must not place any other color in the coloured light box.

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< p > 5. has the function of testing the same color spectrum effect, < /p >

< p > the so-called isochromatic effect is to show that the color of the sample is the same as the requirement under a certain light source, but the color difference can not be accepted under another light source.

There is no difference between the color and the standard under the D65 light source, but the color of the sample is unacceptable under the A light source.

Therefore, all devices for color light sources must be equipped with two or more light sources to test the same chromatic effect.

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< p > 6 < a href= "//www.sjfzxm.com/news/index_c.asp >". < < /p > > conversion light > /a >

< p > according to our daily life experience, in our eyes, it is like having a register. When the color changes in a very short time, we can feel it clearly.

Therefore, to observe the same color spectrum, if we want to change the light source, we must finish it in an instant. We must not be like the lighting tube used in our daily life. It will be high after a flash, because it will stimulate the eyes and affect the evaluation results.

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< p > 7. record standard setting time is less than /p.

< p > all standard color light sources are also produced by light bulbs or light bulbs. Manufacturers will also indicate that their products are in operation within a certain period of time, and the quality of their products is still within acceptable tolerances.

Therefore, an accurate time recorder is indispensable.

Usually, if these pipes are used for more than 2000 hours or a year, they need to be replaced.

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< p > 8. < a href= "//www.sjfzxm.com/news/" > ultraviolet lamp source < /a > /p >

< p > due to the widespread adoption of fluorescent and whitening dyes in industry, the best way to detect these effects is to use non UV light sources and never to lean to a certain area.

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< p > 9. the position of the lamp tube is < /p >.

< p > although there is no specific requirement for the position of the tube, the location of the lamp must have a uniform light source in the coloured light box, and must not be biased to a certain area.

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