Ceramic tile is the permeability of the 20th century developed in 90 of a new product, which combines natural granite, high strength, wear resistance, corrosion resistance and natural marble, glazed tiles in rich decorative effect in a body, its rich vibrant colors and exquisite The design is mainly achieved through the screen printing process, but now mostly using direct screen printing, fine printing design, high efficiency, the process is as follows:
Bottom plate production (Positive) screen version of production (direct photographic plate method) Preparation enamel proofing proofing Screen Printing brick surface treatment
From the above process, we can see that the tiles screen printing screen printing process and the general difference is that enamel preparation, tile processing and other processes. In the production process, if process control properly, the quality of the seepage tile will have a greater impact. The following focuses on the construction ceramic tile on the application of seepage screen printing process should pay attention to some problems.
Brick in the distance on the screen and printing quality
In screen printing, the spacing between the brick and screen printed patterns directly affect the accuracy. As the scraper moves, some deformation occurs screen, printed on the brick pattern and wire-line patterns are not exactly the same, so from a theoretical analysis, brick and wire spacing of the smaller brick on the pattern the higher the precision. Ceramic tile in the construction seepage control the actual production, spacing, neither too big nor too small.
In the screen printing process, when the scraper scratched screen, the request must be in the permeability screen attached to the net wire on the glaze before leaving brick surface, or glaze a large number of infiltration will be as green body infiltration causing fuzzy edges. Moreover, if the screen is too slow to leave tile, glaze with the infiltration of moisture evaporation, seepage glaze is easy to adhere to the wire-line, continuously gathered infiltration glaze particles, resulting in wire mesh plug. Brick and the spacing on the mesh screen from Body surface speed has a direct impact. When the distance is small, the scraper movement during the deformation of small screen, the resulting upward tension also decreases the speed of the surface mesh from brick down, if the glaze viscosity greater infiltration, it is possible attachment to the mesh wire screen can not leave on Er Shi brick surface, causing serious printing defects.
Of course, the screen can not pitch with brick too. Spacing is too large, not only reduce the accuracy of pattern and strength of the material on the screen put a higher demand. Moreover, the screen surface from tile faster glaze infiltrate infiltration reduced the amount of green body, will design the fuzzy light. Therefore, the screen and tile spacing is an important parameter, should be based on accuracy and penetration pattern of performance for comprehensive consideration of glaze.
Brick of the performance of the printing quality
Ordinary screen-printing process is different is that the performance of tile (including tile moisture content, temperature, etc.) on the product's color and design quality has a greater impact, in practice, the green body must maintain a certain humidity and temperature to adapt to the screen printing process requirements.
1. Brick of the water content of the print quality
Brick water content mainly refers to the dried screen printing process into the process when the moisture content, the water content level of greater impact on the screen printing process. When the brick is too low moisture content, the infiltration glaze through wire mesh brick will soon be absorbed easily lead to the aggregation of granule glaze, dry and so that the mesh plug, cause difficulties for printing. When the moisture content is too high brick, tile glaze on the absorption of slow seepage, if the mesh spacing at this time brick and small, scraper scratched, the screen may not be able to attach to the network wire penetration glaze left on the previous brick surface, which glaze easy to adhesion to the wire-line, resulting in mesh plug. Therefore, the general requirements in the actual production of bricks in the water content of 0.2% or less control.
2. Tile temperature of the printing quality
If the tile's temperature is too high (above 70 ), in the printing process, the infiltration of water in the face of glaze in green body temperature will quickly evaporate, so that the viscosity of glaze penetration larger, sticky glaze is easy to plug wire mesh, resulting in printing problems. In addition, the ions will be coming into body colored glaze with the infiltration of moisture evaporation and migration occurs, colored green body within the large concentration of ions from the surface to the green body, causing bleed is not deep, fuzzy images. However, if the tile temperature is too low (below 30 ), green body in the pores narrowed penetration resistance of the corresponding green body glaze penetration increases, rendering the internal ion would be very difficult coming into body, leading to infiltration glaze Body surface in horizontal spread of the product design fuzzy, and the color is very light. Therefore, in order to improve printing quality, we should strictly control the temperature of tile, the general control is appropriate in the 45 ~ 65 . I am a professional writer from China Toys Suppliers, which contains a great deal of information about thin rubber sheet , gasket rubber sheet, welcome to visit!
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