Application and Importance of Color difference Measurement in Coating Industry

The coatings industry occupies an extremely important position in today's market. Whether it is the construction, furniture, automotive or home appliance industries, the existence of coatings cannot be separated from the existence of coatings. Coatings are not only a tool to provide the color of objects, but also an important indicator of the quality and characteristics of products. Therefore, it is particularly important to accurately determine the color of the paint and its difference from the standard color, also known as "color difference".

First, the definition and significance of color difference measurement

Chromatic aberration measurement is a technical process designed to use a specific color measuring instrument to compare and quantify the color differences between different color plates under given conditions. This process ensures the color stability of the paint during the production process and meets consumer expectations and needs for the color of the product.

Materials and instruments for color difference determination

1. Test plate: This is the basic measurement tool, which needs to be prepared according to a specific method to ensure the uniformity of color, and the area of the coating film must be larger than the measurement diameter of the Colorimeter.

2. Color measuring instruments: There are many types of color measuring instruments, and there are different types according to different classification standards:

  Sort by size: portable and desktop.

  Classified according to measurement principles: such as Spectrophotometer and tristimulus Colorimeter.

  - According to the measurement angle: single-angle measurement type and multi-angle measurement type.

  - According to the optical structure: e.g. d/8, d/0, 0/d, 8/d, 45/0 and 0/45.

  - According to the measurement function: such as reflective and reflective transmission integrated.

III. Methods and steps for color difference determination

1. Keep the temperature of the test plate stable, and the optimum test temperature is 23 ℃.

2. Turn on the color measuring instrument and adjust the relevant measurement parameters as required.

3. According to the instrument's guidelines, complete the calibration of the instrument, usually including zero calibration and whiteboard calibration.

4. Measure the standard color plate and save its data in the instrument. During this process, it is necessary to ensure that the measuring port does not leak light, and select the center area of the sample for measurement. For large areas or uneven color samples, it is recommended to choose multi-point measurement and take the average value as the standard value.

5. Using the same conditions as the standard swatch, measure the sample swatch and obtain the color value and color difference value.

IV. Representation of color difference measurement results

The standard chromatic aberration measurement results need to clearly list the absolute value, difference value and chromatic aberration delta E value of the CIEL * a * b * of the standard sample and the sample to be tested. In addition, the test temperature of the sample, the light source used in the instrument, the optical structure, the standard observer angle and other key measurement parameters should also be indicated, and it is best to indicate the brand and model of the instrument.

conclusion

Chromatic aberration measurement occupies a crucial position in the coatings industry. It not only ensures the color consistency in the production process of coatings, but also meets the high standards of consumers for the color of products. In order to ensure the accuracy of the measurement results, it is essential to choose the appropriate color measuring instrument, strictly follow the measurement steps, and accurately record and represent the results.