Application of DPM100 in printing industry

DPM100 small digital microscope is an experimental testing instrument produced by Plyse International Trading (Shanghai) Co., Ltd. DPM100 adopts a new design concept, connects DPM100 to a computer through a USB interface, and analyzes the captured data through software analysis. Sample image, and then analyze the image quality by computer. The DPM100 small digital microscope is very convenient to carry and use, with powerful analysis functions and exquisite structure. The lens is equipped with LED strong light illumination, which is convenient for clear observation of the sample surface. With the help of the powerful analysis software, DPM100 small digital microscope can analyze the dots, lines, characters, etc. on the surface of the printed matter. Therefore, it is widely used in the evaluation of printing quality.

DPM100 small digital microscope is different from the conventional printed surface observation equipment, its magnification can reach 200 times, the observation of the printed surface is clearer, and DPM100 small digital microscope can also transmit the observed image to the computer through the USB interface Save and add a label on it, the saved image is a full-color image, and the image resolution can reach a maximum of 1600 × 1200 pixels. In the process of measuring the surface of printed matter, DPM100 small digital microscope continuously scans the surface of printed matter, and displays the image on the display screen of the computer, and measures the distance, circumference, area and other data in real time on the image.

The analysis software of the DPM100 small digital microscope includes two different operating modes. The first mode is the "basic" mode. In the "basic" mode, it is mainly used to test the dot distance, dot radius and the area of ​​irregular graphics of printed products. . In the second mode, "Advanced" mode, there will be more analysis functions, such as calculating the percentage of dots, analyzing line quality, leaking, marking, and calculating the area, length, width, and circumference of irregular graphics. These two modes can be switched at any time during use.

In the process of quality control of the printed matter, the high-pixel, high-resolution camera of the DPM100 small digital microscope is used to collect the surface information of the printed matter, and a quantitative and intuitive analysis and evaluation of the print quality is performed through the powerful analysis software. The result is very important for the guidance of the printing production process.

1. The overall appearance quality of printed matter

The biggest feature of DPM100 small digital microscope is intuitive. Aim the DPM100 measuring head at the area to be measured and rotate to adjust the focal length, you can obtain a clear image of the measurement area, and you can clearly see the surface of the printed matter on the computer screen. Observe and analyze the shape of the dots, the color of the dots, the flatness of the paper surface, whether the non-graphic areas on the paper surface have been contaminated during the printing process, and the overlapping of the edges of the overprint area on the printed matter. Through the above analysis, it can be judged whether the pressure of the printing machine is appropriate, whether there is ink emulsification on the blanket, and whether there is a large area of ​​dot loss on the printing plate.

2. Quality inspection and analysis of outlets

Use the image quality analysis software included in DPM100 to measure the screen angle, dot pitch, dot radius, and irregular area of ​​the printed matter by selecting different tools in the software. For example, by measuring the size of the dots, and then referring to the shape of the dots, the clarity of the edges of the dots can basically determine whether the dots are too stressed during the printing process or the dots are corroded during the printing process. The dots are deformed. Then, by calculating the area ratio of the dots in the measurement area, you can know the overall reproduction of the dots, determine the degree of increase or decrease of the dots of the printed matter, and so on, and make targeted adjustments to the operating parameters of the printing production.

3. Line and polygon detection and analysis

The DPM100 has a large magnification and a high resolution of the scanned image, so you can clearly see the performance of the lines on the printed matter. Using DPM100's analysis software, you can obtain line distortion, angle tilt, rough edges, etc., and express it with clear values. For graphics, analysis software can automatically obtain data such as polygon area, side length, and perimeter. The above analysis data will simplify the quality analysis process of the lines and polygons of the printed matter.

4. Detection and analysis of blank spots and spots

In the process of printing solid color blocks, due to the unevenness of the paper surface and other factors, blank spots often appear in the solid color blocks. The blank spot detection tool of the DPM100 small digital microscope can detect and record the number of blank spots. Calculate the average area size of blank spots. In addition, the scanned image can be reversed, making it easier for the operator to observe blank spots.

Speckle refers to unintended, varying light reflections that occur in a printed area with a uniform tone, appearing as a cloudy cloud, grain, or other regular pattern. Marking is generally not seen in text printing, and it is also difficult to find in printing "heavier" patterns, and it is particularly noticeable in areas where the printing is gentle, such as the sky or other backgrounds with uniform tones. DPM100 divides the entire image into multiple small areas through analysis software, and calculates the changes in these areas, and finally counts the number of speckle and speckle particles, the size range of particles and other data.

In summary, the DPM100 small digital microscope is a very practical experimental testing instrument. The DPM100 small digital microscope can comprehensively and intuitively observe the surface condition of the printed matter, allowing users to intuitively observe the surface of the printed matter. Powerful analysis software to quantify the overall appearance quality of printed matter, dot quality, line and polygon analysis, blank points and speckles and other measurement indicators to quantify the output, which facilitates the use of the production line, thereby effectively improving production efficiency and improving Print quality.

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