Single-perspective window advertisements are easy to see when the daylight is good, but when the night falls on the ground, nothing can be seen. If you want to see car window advertisements at any time during the night, the only solution is to use luminous fluorescent ink.
Luminous ink is made by high-tech means using long-lasting rare earth luminescent materials. In the daytime, it absorbs sunlight for 10-30 minutes, and it will automatically continue to emit light for more than 10 hours, so it still emits light until midnight, especially when the car is driving in the dark, the light is particularly bright and eye-catching. It is similar to a neon advertising. Neon lights require power to emit light. Luminous ink does not require electricity, saves energy, and is used indefinitely. It can also be called solar neon advertising. Luminous ink is non-toxic, harmless and non-radiating, with a life span of more than 10 years. Luminous fluorescent ink can print the patterns and text you need through screen printing. The design screen should expose the light-emitting layer, do not cover it all, otherwise it will reduce the light-emitting effect. In addition, try to keep the design manuscript sent by the customer. If the font in the advertisement is red, then print the luminous ink with a width of 1.5 to 3 cm on the periphery of the red font, or the white font with blue bottom and print it on the font. Luminous ink is better.
The single perspective advertising process opens up new markets for screen printing, so the single perspective screen printing process is introduced as follows:
1. Preparation before printing
1. Selection and identification of plastic sheets
â‘ Polyvinyl chloride (PVC). Appearance: transparent to opaque and hard. Flammability: flame retardant. Burning in the flame is yellow, the edge of the flame is green, white smoke; there is a softening phenomenon, the smell of burnt can be smelled.
â‘¡ Polyethylene (PE). Appearance: translucent to opaque, transparent film. Flammability: Combustible in flames. After leaving the flame, slowly extinguish or continue to burn. When burning, the upper end of the flame is yellow and the lower end is blue; there is a phenomenon of melting and dripping. Can smell paraffin.
â‘¢Polypropylene (PP) has the same appearance and flammability as polyethylene.
â‘£Polyester resin (PET), appearance: transparent sheet. Flammability: Flammable, leave the flame and continue to burn. The flame is yellow, black smoke; slightly expanded, sometimes cracked, with a styrene smell. The selection of materials is very important, because single perspective advertising cannot affect the driver's driving, so the perspective must be absolutely guaranteed. Here it is recommended that the single-see-through film selection material is preferably treated PET, which has good ink adhesion and can meet printing requirements. At present, PET is sold in rolls in the market, and the specifications are generally 60cm wide and 500m long.
2. Choose ink
There are many varieties of plastic ink series. According to different printing materials, the ink suitable for the nature of the printing material should be selected, otherwise it will cause economic losses. Before formal mass production, we should do a good job of experimental work to prove which brand ink is suitable for printing materials. Once the matching is completed, do not change it at will. If the printing material is PET, then PET screen printing ink should be selected, domestic inks should be considered as much as possible to reduce costs, and low prices are conducive to market competition.
3. To produce a film, use 13-15L 50% negative picture dot film, the size is 130 × 56cm, and use water-sensitive photoresist to produce a dot version.
4. In order to save money, no black film is used, and the black adhesive paper is cut into a trapezoid shape with a size of 128 × 104 × 56cm. Print two pieces with oily photoresist, use black ink and white ink screens respectively, or cut a trapezoidal shape with white newspaper, put it in a moderate position on the stretched frame cloth, and then use the glass plate as a bead. In the middle, so as not to slide the paper on the mesh cloth, and then use a small scraper to scrape the sealing glue to the surrounding frame repeatedly, dry naturally, and strengthen by exposure.
Second, the printing process
Cut the PET into pieces with a size of 30 × 60cm. Wipe the PET sheet clean with alcohol. When printing dots with water-based tearable ink, each sheet must be checked for the printing quality of the dots. If there is any problem, it can be washed off with water and then printed again. The full version is printed with PET black ink and dried naturally. The full version is printed with PET white ink. Spot or four-color inks are printed on white ink. Finally, screen printing PET luminous fluorescent ink. Use advertising self-adhesive paper to tear off the water-based tearable ink, and the part where the tearable ink is printed will become transparent, and the part where the black PET ink is printed will leave the ink, so that the single perspective effect is fully presented.
3. Printing experience
If there is too much ink attached to the PET surface during printing, the reason is that the viscosity of the ink is too high. The solutions are: reduce the pressure of the ink coating plate; increase the speed of the ink coating plate; increase the number of screens; reduce the angle of scraping and ink coating ; Reduce the thickness of the template. If the ink layer attached to the PET surface is too thin, the solution is the opposite of the measures taken above.
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