Screen printing technology and skills of the hotte

Perspective advertising silk printing technology and skills

in recent years, Wuhan can often see commodity advertisements pasted on the glass behind taxis walking on the road (see Figure 1), which is one-way perspective advertising. In fact, one-way perspective printing technology has been adopted as early as the 1990s, but it is not as popular and popularized as it is now

the one-way perspective film is pasted on the car body glass, which can clearly convey the advertising content from the outside, and it will not affect the driver's line of sight when looking out from the car with the power plugged in. Why is the positive and negative effect different? The original one-way perspective film has black dots on the reverse side, which absorb light. On the front, there are color dots. If you reflect the color light, you can see the picture composed of color dots, just as in a large hospital, the Department of Ophthalmology, sesda high tech, realized that the numbers and graphics of color composition on the blind chart are similar

unidirectional perspective technology has opened up a new market for silk printing. Now the one-way perspective printing process is introduced as follows

1 prepress preparation

the best material for unidirectional perspective film is treated polyester resin (PET) transparent sheet, with good ink adhesion, which can meet the printing requirements. At present, pet is sold in rolls on the market, generally 60cm wide and 500m long

first, make a film for printing with water-based tear able ink. The film is made into 13 ~ 15 lines, 50% negative film dots, and the film size is 130cm × 56cm。 Sun it with sexy photoresist

in order to save money, the black self-adhesive paper cut into trapezoidal size is used to replace the film, and it is smoothly adhered to the wire, and then sealed with two pieces of oil sensitive photoresist for printing, which are used as black ink and white ink plates for printing the full plate respectively

2 printing process

(1) cut pet into 130cm × 60cm size

(2) wipe the PET sheet with alcohol

(3) the printing quality of each water-based tear able ink dot must be checked. If there is a problem, it can be washed off with water and then re printed

(4) pet black ink is printed on the full plate and dried naturally

(5) print pet white ink on the full plate

(China's extruder industry has many beneficial conditions in foreign trade export. 6) print spot color or four primary color ink on white ink

(7) tear off the water-based tear able ink on the printing with advertising self-adhesive paper, and all parts of the tear able ink will become transparent, and all parts of the high concentration of T black ink in the import source of PE will leave the ink, so that the effect of one-way perspective will be fully presented

there are many kinds of plastic ink series. According to different printing materials, we should choose the appropriate ink, otherwise it will cause unnecessary economic losses. Choosing ink is the key. Before formal mass production, a lot of experiments should be done to prove which brand of ink is suitable for printing materials. Once the matching is completed, do not change it at will

Author: Liu Anning