You can find out about the applications of printed colorimeters

You can find out about the applications of printed colorimeters

When it comes to the application of printing colorimeter, I believe that many people will feel unfamiliar and don't know what it is. What do you know about the applications of printed colorimeters? The biggest advantage of using a colorimeter to participate in color mixing is that you can modify the formula according to the data provided by the colorimeter, refer to the color map, and complete the color matching task faster and more accurately. First: the measurement of the printing plant when the user gets a sample, it is necessary to reproduce the same color as the sample, this time it is necessary to repeatedly proof, in the past, the printing plant relied on the human eye to compare the difference between the sample and the standard sample, when it is within the allowable range, the process is handed over to the workshop to produce. Due to the subjective factors of the human eye, this difference is difficult to determine, at this time, the difference between the sample and the standard sample can be measured with a colorimeter, and the color difference of the sample can be determined according to the difference, which can reduce the uncertainty of the human eye observation Figure 1 The biggest advantage of using a colorimeter to participate in color mixing is that it can modify the formula according to the data provided by the colorimeter and refer to the color map, so as to complete the task of color matching faster and more accurately, the following is an example If the color coordinate of the standard sample is L*=74.40,a*=1.67,b*=23.80 Use the [standard] setting function of ADCI-60-C to set the measured value of the standard sample as the standard, (refer to the manual of ADCI-60-C for specific operation), and then measure the sample, and obtain the result of the sample L*=74.39,a*=0.67,b*=20.30; dL*=0.01,da*=1.0,db*=1.50 Refer to the color coordinate diagram as above, you can see that the next time you revise the sample formula, you should add green (or minus red), add blue (or minus yellow), and you can determine the degree of addition according to the test results, repeat several times, until the color difference is within the allowable range, and experienced users can basically determine the proportion of the formula between 2-3 times according to the value of the colorimeter. Second: the role of colorimeter in quality control When the formula is determined, put into production, due to the change of many factors in production, the batch of products may have color deviation, so that the colorimeter must often be used in production to measure the color deviation, to adjust the production process, in order to achieve the consistency of product color Third: the volume of transmission Now customers generally provide color cards or samples, so that when signing a contract with the user, try to save the physical object as a standard, No matter how high-end the instrument, according to the actual environment, there are deviations, The national color standards are based on standard whiteboards and color swatches, not on instruments. Common problems 1, a customer provides a set of color coordinates to the manufacturer, does not provide standard samples In this case, we must figure out that the color coordinates provided by the customer are measured in that color space, as well as lighting conditions, light source types, different color coordinate spaces, the measured values are very different, and there is no comparability Under the same color space, the lighting conditions are different, and the color coordinates are also relatively different, but the color difference is relatively small. Suggestion: Let customers provide standard samples, use standard samples to transmit to users, use standard samples as benchmarks, and control chromatic aberration 3. All instruments in the printing plant, including spectroscopic colorimeters, are used as benchmarks to adjust the instruments, and when the instrument is used for a period of time, it must be recalibrated with a standard whiteboard to achieve the highest measurement accuracy. When the user gets a sample, it needs to reproduce the same color as this sample, at this time it is necessary to repeatedly proof, in the past, it was by human eye to compare the difference between the small sample and the standard sample, when it is within the allowable range, the process is handed over to the workshop to produce. Due to the subjective factors of the human eye, this difference is difficult to determine, at this time, the difference between the sample and the standard sample can be measured with a colorimeter, and the color difference of the sample is determined according to the difference whether it meets the range, so that the uncertainty of the human eye observation can be reduced.