1. Basemap making

In addition to computer or manual drawing, decorative patterns on plastic samples and artificial leather are mostly used for decorative patterns. The surface of plastic samples should be clear, uniform and flat. Spray a layer of black self-drying paint first. After drying, apply white powder (calcium carbonate) with more than 200 meshes to fill the lines, and then gently wipe off the white powder on the protruding surface to make it black until the layout pattern is clear and black and white, and the base map is completed. If you choose the pattern of artificial leather, you can nail it flat on the board and process it according to the above requirements. It is best to choose black artificial leather, which can save painting.

2. Photographic plate making

Use CR left and right film, 1: 1 to make the base map. The size of photographic film should be about 100mm×200mm, which is convenient for screen printing and decal transfer.

3 screen printing

It is made of 200 ~ 300 mesh yellow polyester yarn, 0.02mm thick blue photosensitive film, aluminum frame and photographic negative, and it is made according to the method of printed circuit screen printing.

4 ink mixing

Select 500 grams of high-quality solid asphalt, put it in a clean and rustless tin can, add 300 ml of kerosene, and refine it on an adjustable temperature electric furnace.

1 ~ 2 hours, control the slight boiling state, stir properly, refine to a consistency suitable for silk screen printing, and preferably cool to room temperature to be soft and frozen, and the surface will not be crusted or wrinkled. This is asphalt ink. Weight ratio of asphalt ink to 27 1 1-4 ink.

1: 1, then add No.78 drying oil, the amount of which is 2% ~ 5% of the weight of the mixed ink, and mix evenly with an ink knife to obtain the corrosion-resistant transfer printing ink.

5 decal paper printed with decorative patterns

Use WPS400 screen printing machine, install screen printing plate, apply proper amount of corrosion-resistant transfer printing ink on rubber scraper, first use waste blueprint for reverse printing, with uniform force, light weight and moderate force, and then use decal paper for printing after printing uniform and clear decorative patterns. Before printing, the decal paper should be cut into appropriate sizes and leveled with a clean rubber scraper. In the printing process, if the ink blocks the mesh and the pattern is not clear, it means that the ink is too dry and can be diluted by adding appropriate kerosene; If the printed pattern is easy to blur, it means there is too much kerosene in the ink. You can put the ink on the glass plate, stir it repeatedly with an ink knife, and then print some kerosene by volatilization.

6 ink drying

Put the printed decal paper on the grid of the oven, and spread it evenly with the ink face up, without overlapping. Bake at 40~45℃ until the ink is half dry, that is, the ink on the decal paper does not stick to hands, but will stick to hands with a little pressure, generally about 10 ~ 15 min. The ink is too dry, and it does not stick to the mold or has poor adhesion when transferring; The ink is too wet, and the transfer is easy to blur.

7 decal transfer

According to the characteristics of the mold cavity, cut the decal paper into a convenient shape, and gently remove a layer of thin paper with decorative patterns, with the ink facing up.

Mold, carefully paste, flat and wrinkle-free, scrape with a rubber scraper, knead the curved surface into a ball with absorbent cotton, press the paper base vertically, and transfer the ink on the decal paper to the mold. After the transfer is completed, wet the decal paper with a little water with a sponge, then gently peel off the paper base, and use a sponge or absorbent paper to absorb the water on the mold.

8 drying

9 seasonings

10 corrosion

1 1 Inspection, cleaning and rust prevention