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Trademark design and silk printing process (Part 1)

the whole process of trademark printing can be roughly divided into four parts: design, plate making, printing and post press processing, which are interrelated and inseparable. This paper briefly introduces the characteristics and requirements of trademark printing process

I. trademark printing design

the process design of trademark printing has the following characteristics:

1 Design for the end use of live parts

different live parts have different requirements for the paper used. For example, the wine label of bottled wine adopts the automatic labeling method, and the bending direction after gelatinization is required to match the automatic labeling machine, otherwise it cannot be produced on the automatic assembly line

2. Hollowed out and inlaid pattern design

hollowed out and inlaid processing is often required in trademark design, especially many things have their reasons. The reason for its existence is that products that need to be printed with gold (silver) must be designed as hollowed out version, otherwise the gold (silver) ink is directly printed on other inks, which is prone to the problem of color darkening

3. One of the remarkable features of spell couplet

trademark printing is that there are many spell couplets, as few as two, as many as dozens. How many drawings are appropriate depends on the process

(1) the difficulty of post-processing of the company headquartered in Xiamen. If there are many post-processing processes of live parts, the layout should not be too large. Otherwise, due to poor temperature and humidity control in the printing workshop, it is easy to cause paper pumping, which will not only affect overprint, but also cause difficulties in positioning and registration for subsequent hot stamping, die cutting and other processes

(2) abnormal trademark. The trademark area is generally not large. For thin paper special-shaped trademarks that need to be die-cut, the splicing should not be too much, otherwise the accuracy of die-cutting plate production will affect the die-cutting quality

(3) printing quantity. If the printing quantity is not large, the number of splices should not be too large, otherwise the layout is too large and the cost of making die-cutting plate is high, which will inevitably increase the cost

(4) paper opening number. Due to the influence of trademark size, it is impossible to accurately splice into octave, quarto or folio plates, so we should choose the appropriate splicing method based on the principle of saving printing paper as much as possible

it can be seen from the characteristics of trademark printing design that an excellent trademark designer should not only have innovative design concepts and flexible design skills, but also be familiar with printing and post press processing technology, so that the designed trademark is novel and unique, and meets the requirements of printing and post press processing technology, so as to avoid unnecessary economic losses. For example, if the circumference of the trademark pattern is too close to the size of the finished product, due to the influence of paper deformation and low precision of the die-cutting tool, the die-cutting finished product will often be deflected and the error will be too large, resulting in the scrapping of the product. In this case, designers should adjust and change the design to meet the requirements of printing and post press processing

II. Making silk screen version

1 The basic process of photosensitive emulsion direct plate making method

photosensitive emulsion direct plate making method is a widely used plate making method in China at present, and its process flow mainly includes the following points

(1) degrease. Before making the plate, the silk must be degreased with a supporting degreaser. Note that household detergent or descaling agent cannot be used

(2) drying. Rinse the degreased silk with clean water, remove all the moisture on the plate with an air brush, and then put it into an oven at 30 ~ 40 ℃ for thorough drying

(3) apply photosensitive adhesive. Use a suitable applicator to evenly scrape the diazo emulsion onto the plate, usually wet to wet

(4) version drying. Will be painted favorably 4 The resolution of deformation measurement of the experimental machine refers to the measurable minimum accuracy of the measurement data of the photoelectric encoder of the experimental machine. The plate level of the photoemulsion is placed in the drying oven, with the printing side down, and the drying temperature shall not exceed 40 ℃

(5) supplementary gluing. In order to eliminate the unevenness of the photosensitive layer of the plate, a layer of photosensitive emulsion can be added on the printing surface of the plate

(6) the R & D expenditure of local enterprises accounted for only 1.77% of the enterprise's sales revenue on average in 2010). Use the same method as the first drying to dry the plate again. Note that the drying temperature should not exceed 40 ℃

(7) exposure. Use a suitable light source, such as metal halogen lamp, to expose the plate, and the exposure time is determined by hierarchical exposure

(8) development. Spray the development with a tap water spray gun with appropriate water pressure to completely wash out the pictures and texts on the plate

(9) version drying. Use unused white newspaper or hygroscopic cloth to gently wipe off the excess water on the page. In case of mass production, it is necessary to use special equipment to absorb moisture, and finally put the version in the drying oven for drying

(10) revision. Water soluble silk filler covers pinholes or other defects on the plate

(to be continued)