Screen printing panel question and answer (six) Q: What are the methods for making the resist layer of the sign panel, L is made of bone glue or polyvinyl alcohol solution to make the photoresist coated on the metal plate, after printing, developing, coloring, After drying, apply shellac as a protective layer on the back.
The photosensitive dry film is heated and attached to the metal plate. It can be used as a resist layer for etching signs after printing and development, and a protective layer is also required on the back surface.
3 Use a computer to paste on the sticker on the metal plate, which can be directly used as a resist layer for etching the sign.
It is printed on a metal plate to form a graphic pattern. After drying, it can be used as a resist layer for the resist plate.
Kind, sprinkle, shaker, etc. Corrosion is also the use of a pen to etch the solution back and forth on the metal plate. Splashing is the process of continuously pouring the solution onto the surface of the metal plate with a water spoon for etching. The shaker is a plastic basin that is manually shaken to allow the etchant on the metal plate to flow back and forth.
The trolley-type impeller continually splashes the etching solution onto the metal plate for etching.
â–¡ Zhao Xinfeng In the middle of a large porcelain cylinder, a vertical shaft with blades is used to make a mixer. The etching liquid is continuously stirred, and the metal plate is placed on the side of the cylinder for etching.
Etching with a spray etch machine: Spray the etchant from top to bottom with several water jets to control the speed.
Etching by electrolytic etching machine: the metal plate to be etched is connected to the positive level of the power supply, and after flattening, the shower is connected to the negative level of the power source, and the discharged solution is a conductive liquid, which is etched.
Q: What are the commonly used etching solutions? A: The traditional method is to use ferric chloride as the corrosive liquid. Ferric chloride is available in general chemical stores and can be used in industrial applications. However, due to the excessive contamination of ferric chloride, copper chloride, sodium chloride and hydrochloric acid are basically used. These three solutions are prepared together for etching according to different materials (copper, aluminum, stainless steel). Electrolysis can also be used, which uses sodium chloride as an etching solution for etching.
Q: What are the main points in the printing and manufacturing process for etching signs with photosensitive ink? The thickness of the printed film layer should not be too thick or too thin. Too thick is easy to produce underexposure, too thin and easy to overexpose. Generally required thickness 60) C, the temperature can not be too high, the time can not be too long, generally 10nhn can be.
The operating environment is strictly protected from direct sunlight. The window is equipped with curtains. The incandescent lamp needs to be operated under dust-free fluorescent lamps. The indoor temperature is (20~25)C and the humidity is about 70%.
4. There must be good ventilation in the workroom.
The ink is placed in a cool place after use, and its shelf life is generally 3 months.
Q: How to make signs with titanium plate, A: The surface of the titanium plate is degreased (gasoline + alcohol) bright (polished) photosensitive ink printing (80 mesh screen) or printing can be - drying version (3 ~ 5 ) nhn development (sodium carbonate 10%) revision (back coated with protective layer) etching - washing - peeling film (sodium hydroxide 30%, 100C) rinse with water - finished product.
Q: What should I pay attention to when the etched label is filled? A: The character after the label is etched should be filled with paint. Generally, the alkyd enamel is used. When a small amount is used, the needle is used to absorb the paint, and the middle of the characters is wiped or used. After the full version is painted, use solvent-resistant PPq, wipe with a white cloth (do not use a colored cloth, easily fade) or wipe with thinner (20%) + alcohol (80%).
Q: What should be paid attention to during the production process of the etched signage, the word map on the sign should be bright, it is best to use bold characters, not to use the Song characters, because the Song characters are easy to break when etched.
The surface of the plastic is required to be free of scratches. If it is slightly scratched, it should be smoothed with charcoal or sandpaper.
The etched font of the sign should not be too deep. In order to prevent the side from being etched during etching, it is preferable to add a side etchant during etching.
The back of the etched sign must be protected with anti-corrosion materials to avoid etching.
Fitness Vest,Fitness Yoga Vest,Functional Dry Fit Yoga Wear,Womens Yoga Vest
Shaoxing Yizhong Textile And Garment Co.,Ltd , https://www.yizhongsport.com