Hardcover notebook printing process flow introduction

22-10-2019

       Hardcover notebook printing covers several major printing methods, and the process flow varies from printing to printing. Let's take a look at the process flow of hardcover notebook printing flexible plate making, I hope to help everyone.


  1. Original. The original design suitable for flexible printing should have the following characteristics: more color number, but less overprinting; no special small details are required to be reproduced; the network cable is not too high, but the color printing effect can be obtained; the packaging processing can be performed online.


  2. Film (negative film) meets the needs of plate making, the picture is clear, the size and size are accurate; the frosted film is required to have the same density of the four corners of the film; the film is used as the word; the density measured by the transmission density meter, the white bit density is below 0.06; The density is 3.5 or more.


  3. Exposure includes back exposure and main exposure. Back exposure. The support film of the photosensitive resin plate is upward, and the protective film is laid down in the exposure drawer for exposure. The ultraviolet light passes through the support film to cure the photosensitive adhesive layer to establish a stable substrate, and also controls the depth of the plate to strengthen the bonding force between the support film and the photosensitive resin layer. The back exposure time is determined by the required substrate thickness.

Hardcover notebook printing

  4. Rinse. The unexposed portion is washed and dissolved, and the photopolymerized relief is retained. The length of the plate-washing time is determined by the thickness of the plate and the depth of the print. The plate-washing time is too short. The plate will leave unsensitive resin and affect the plate-making depth. If the plate-washing time is too long, the plate will swell, resulting in fine deformation or Fall off.


  5. Drying. Remove the washing solvent to restore the original size to the plate. The baking temperature is between 50 and 60 °C. The baking time is determined by the thickness of the plate and the length of the plate washing time. Generally, the thick plate is two hours and the thin plate is one hour. If the baking time is too long, the baking temperature will be too high, which will make the printing plate become brittle and affect the printing life. If the baking temperature is too low, the drying time will be prolonged, the baking time will be too short, and the printing will appear bad.


  6. Post processing. That is, except for sticking and post exposure. The photosensitive resin is completely hardened (polymerized) to the desired hardness index, and the plate tack is eliminated to facilitate ink transfer. The post-treatment time was obtained from the test, and the purpose was not to crack or stick.


  The above is about the hardcover notebook printing process flow introduction, I hope everyone knows the hardcover notebook process, it is helpful to everyone.


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