Material suitability of the best printing suitabil

2022-08-23
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Material suitability of Printability analysis

material suitability

selection of printing plate: there are many kinds of printing plates, which can be divided into aluminum, zinc, stone, resin, nylon, paperboard and glass according to:

plate materials

the structure is divided into single layer, double layer and multi-layer

plate making methods include manual, transcribing, optical and electronic

the shape of the plate can be divided into flat convex, flat and flat concave

grinding methods include ball milling, brush grinding, chemical grinding, electronic chemical grinding and sand blasting grinding

layout processing includes chemistry and anode

light film coating methods include self coating, machine coating and pre coating

the coating surface of light film can be divided into one side and two sides

the printing plate can be divided into positive type and negative type

the light film treatment methods can be divided into adding film type and reducing film type

the purpose of printing machine is divided into proofing machine, fast machine, sheet forming machine, rotary machine and transaction printing machine

from the above, there are quite a lot of types. In fact, at present, there are only one type of printing plate used by many lithographic printing plants in Taiwan, namely, pre coated type and positive type, referred to as PS version for short. The quality produced by using this kind of printing plate is quite high, and the plate making procedure is simple. As long as it is automatically processed in the plate punching machine, it can be completed in a few minutes. There are also a few family printing houses that use zinc or aluminum plates to make protein plates for a small amount of printing plates

paper selection: there are three choices: type, quality and weight. In terms of types, there are

printing paper: Securities paper, book printing paper, magazine paper, paper, molding paper, coated paper, Bible paper, Daolin paper, etc

writing paper: account paper, letter paper, miscellaneous note paper, typing paper, card paper, drawing paper

picture paper: watercolor paper, special paper, ordinary paper, charcoal paper, sea paper

packaging paper: kraft paper, sulphurous acid paper, match paper, rust proof paper, cigarette paper, fruit paper, sulfuric acid paper, cellophane, wax paper

filter paper: chemical analysis paper, insulating paper

absorbent paper: blotting paper, carbon paper, napkin, toilet paper

special processed paper: carbon backing base paper, photosensitive base paper, fiber paper

paperboard: yellow paperboard, white paperboard, core paperboard, corrugated paperboard, ticket paperboard, construction paperboard and other eight categories

seeing that there are so many kinds above, I don't know how to choose at a time. In fact, it's not difficult, because the most commonly used are Daolin paper, molded paper and coated paper. In terms of quality selection, Daolin paper includes whole wood Daolin, ivory Daolin, baidaolin and color Daolin paper. There are white mold making, beige mold making and color mold making. Coated paper includes mirror coated paper, super light double copper, super grade double copper, double-sided coated paper, single-sided coated paper, snow coated paper and cloth coated paper. In addition, there are choices of book printing paper, magazine paper, delimited paper and advanced delimited paper. In fact, only a few of them are often contacted

in addition, there are two commonly used ways to weigh the weight of paper: one is the base weight, which is more commonly used internationally. It is the weight of one meter square of paper on the electronic balance, which is measured in grams, that is, GSM, or "meter level"

one is the weight of a ream, and the weight of a ream of 500 sheets of paper is pounds/ream. The above two kinds are used in China, but for convenience, it is easier to use the base weight, so as to avoid the difference between the 31x43 "pound and the 25x35" pound of paper with the same thickness, which is often prone to confusion

the base weight of most paper ranges from 60 to 100gsm, coated paper from 80 to 190gsm, and molded paper is as low as 45 GSM. As long as you understand the purpose, function and characteristics before use, and make the best choice, you will also have high requirements for the performance of interior materials, which is not difficult. In addition, paper is closely related to humidity. First of all, we need to know that paper is a pulp composed of 99% water, 0.5 to 1% cellulose, filler and gum, which is called pulp for short. Then this pulp is sent to the paper machine, and the paper is spread on the moving silk through a long funnel to filter out most of the water, and then the excess water is extruded and scalded dry by a hot pressing wheel to make paper. Directly connect different subroutine modules. After the above simple description, we can know that there are "face and non face" on the paper. The face is thick and the non face is flat. At the same time, there will also be "Silk flow", that is, the arrangement of fibers in the direction of long strips recognized by users, which directly affects the paper. The phenomenon of bending after moisture has a great relationship with the bookbinding of books. If the silk flow of the paper follows the long side, the book edge is straight, otherwise it is very easy to bend

choice of ink: lithographic printing ink is mostly transparent four primary color ink. There is not much choice in color printing, and gold and silver are added at most. On the contrary, there are more choices in chromatic printing, and there will be a variety of choices for certain special requirements in special printing, such as fluorescent ink, pearl ink, desensitized black, magnetic ink, ultraviolet ink, etc. There are also transparent and opaque inks. At present, many large printing plants use four primary color transparent ink in large barrels, and use high-pressure pump automatic delivery pipe to send the ink directly to the printing machine. The staff will not be too troublesome, and there is no need to adjust the ink. This work has become very easy

(to be continued)

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