Color box printing process and characteristics
Packaging color box printing and general printing has many similarities, but because the packaging color box is mainly used in product packaging so there will be a forest of shapes in the appearance, so the color box printing will appear more and more diversified as well as complexity, the following to understand the process and characteristics of color box printing.
Color box printing process
The production process is roughly as follows: carton structure planning – making printing outline – decorative pattern planning – plate making (film / screen) printing – surface treatment (varnishing, calendaring / buffing, laminating) laminating pits – die-cutting (i.e., beer boxes) Box gluing (folding, stapling) Appearance checking – Packaging
In addition, parallel work is carried out: production of backing processing plan – carving backing plate; production of die-cutting row material plan – sawing die-cutting plate – clamping platen, cutter – die-cutting plate
Main equipment: screen room, printing machine, oiling machine/grinding machine, active laminating machine) die-cutting machine, active box gluing/stapling machine)
Process points elucidated:
1 out of the film: color production, each color out of a sheet
2 Printing: including lithographic/offset printing, gravure, letterpress/flexographic, screen printing, etc., generally use sheet lithographic printing, according to the planning requirements of single-color, two-color, three-color, four-color and multi-color
3 surface treatment:
① Varnish: refers to the surface of the printed matter coated or sprayed, printed on a layer of colorless bright coating, after leveling, drying and calendaring on the surface of the printed matter constitutes a thin and uniform bright layer, increase the surface luster and three-dimensional sense, so that it is more exquisite and beautiful and useful to protect the printed graphic. Commonly used coatings are water-based varnish, solvent-based varnish, UV varnish and other methods.
② calendering / buffing: refers to the surface of the prints coated with a layer of buffing oil, and then after high-temperature steel plate calendering. Polished products should be used to dry the paper rack, until the product is completely cooled before use.
③ Laminating: A layer of PVA adhesive film is applied on the printed products to improve the surface gloss and make the color firm. The defect is that the paper products can not be recovered for use, and it is easy to form red color pollution.
Features of color box printing
1 Diversification of printing materials
Because of the color box printing more or less used for product packaging, so has the characteristics of printing material diversity, in addition to commonly used paper and cardboard, but also in plastic, metal, glass and ceramics and a variety of suitable materials for printing, in addition to the shape of the packaging will be flat, curved surfaces as well as irregular surfaces for printing.
2 Diversification of printing methods
In addition to the conventional offset printing, gravure printing, flexographic printing and screen printing, in order to increase some special decoration or functional role, the quality of the color box printing to ensure that the general use of some special printing technology, such as the use of three-dimensional printing, laser holographic printing, and liquid crystal printing and combination of printing and other methods.
3 pre-press and post-press processing disposal diversification
Color box printing due to the printing of the material batch type is very much, due to the disposal process before and after printing also presents diversified characteristics, and according to different materials but also the use of varnishing, laminating, hot stamping and die-cutting molding and so on a variety of different processing technology, for example, in the printing of plastic packaging, in order to eliminate the surface of the static electricity and let the ink can be better adhered to the surface of the plastic, in the color box printing before the selection of corona
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