CN1014224B - One-step print for hot pressed raised carvings - Google Patents

Abstract

The present invention relates to an electrochemical aluminum thermoprinting method. Various complicated and fine patterns are thermally printed on metal luster of the electrochemical aluminum metal, and convexly printed and formed once. The patterns convexly printed have clear texture, simultaneous presentation of refraction and stereo, vivid pattern, shortening of product cycle, reduction of printing labor cost by 50%, convenient technology and easy popularization. The present invention is suitable for the packaging of various high-grade wines, exported foods, famous and precious Chinese patent medicines and cosmetics, and the printing of year calendars and cards.

Description

One-step print for hot pressed raised carvings

The present invention is a kind of method of thermoprint electrification aluminium.

It belongs to print field, and it is applicable to the packing of various high-grade drinks, export food, famous and precious Chinese patent drug class and various cosmetics, and the printing of year calendar, card.

In this field, adopt traditional dull and stereotyped thermoprint for a long time always, can only display plane metallic luster, on the metallic luster face, can not produce various figure lines.Just announcing that the Shanghai City people print eight factories in " printing technology " magazine (88 years the 10th phases) recently, for high refractive power printing, just on aluminium base of electrification, produce simple garden shape or triangle geometry pattern, and be to utilize overseas equipment, foreign technology, with two formes, printing just only can reach the refractive power effect at twice.

Their typography is:

Find out that from above process chart the look original text of design aspect and draft are the first procedures before the printing industry photomechanical production, it is common to belong to each producer.Next procedure is photomechanical production, thermoprint electrification aluminium, refractive power printing and other printing.Its step is as follows: at first the draft of finishing, according to the desired size of client, amplify on camera or dwindle, the egative film of taking is repaired prepared plate-making, the copperplate (or photo zincography) of plate-making usefulness cuts by forme area size, clean version is handled back coating photosensitive liquid on coating machine, after the oven dry, be placed on the copperplate (or photo zincography) that scribbles sensitization liquid with photographic negative again and expose, develop, remove dirty then, be coated with anti-numb agent, at last by corroding into forme.Corrosion is to carry out in the powderless etching cylinder, and the forme degree of depth that erodes away is generally 20～90.Various formes have so just been made.Wherein the refractive power forme just needs two.First is according to design picture required electrochemical aluminium area size shape, makes a face profile version (thermoprint electrification aluminium base with); Make garden shape or leg-of-mutton lines convex epirelief version for second, first during printing with first version, thermoprint goes out electrochemical aluminium plane (metallic luster face just) on thermoprinting machine, and then with second geometric figure convex epirelief version, on aluminium base of original electrification, print off concavo-convex geometric pattern, print moulding this twice, show the printing process of well-regulated geometric pattern, China just claims the refractive power printing at present.Press print order, can do the refractive power printing earlier, do other ink printing (just using ink printing other various patterns and literal) again, also can print other printing ink earlier and do the refractive power printing again.After cross cutting (or cutting) is the refractive power product.

The realization of refractive power effect is a utilization reflection of light characteristic, reflects the change of light reflection with multi-angle, produces the stratified sense of glittering, or two-dimentional solid image.But because the level and smooth degree difference of body surface, and minute surface reflection and diffuse reflection are arranged, and the refractive power effect is mainly by the minute surface reflection, and diffuse reflection phenomenon doubling light effect plays destruction, does not allow in principle to produce.So the major defect of this technology is because refractive power convex epirelief version corrosion deep, and lines are trickle, so the convex epirelief lines of forme can not be complete bright and clean, plate-making quality is difficult to hold, cause printed picture to have the diffuse reflection phenomenon to produce, directly influence the refractive power effect, this is an one.Its two, make two formes, waste plate liquid medicine, manpower, time.Its three, printing twice need take two machines, has increased the scheduling level, has prolonged production life cycle, increases the paper loss rate, causes a large amount of wastes of human and material resources.Its four because the lines of convex epirelief version are very trickle, need quite smooth pressure during printing, very hard during make-ready, even take a long time, be difficult to also guarantee that convex epirelief lines pressurized is even, make two-dimentional solid image impaired, seriously influenced the refractive power effect.Its five, domestic refractive power printing at present is a large amount of foreign capitals of cost, introduces overseas equipment and plate, and is not only expensive big, the difficult grasp, what difficult popularization was main is the pattern of printing, only limits to geometric figure, the pattern dullness does not satisfy the market demand far away.

In view of the shortcoming that exists in the above-mentioned prior art, the objective of the invention is to provide a kind of when the thermoprint electrochemical aluminum foil, make its surface present the printing process of the trickle figure line of various complexity simultaneously, and once boiling hot protruding moulding, and can reach best refractive power effect, adopt home equipment can finish equally.

Our typography is:

It is just the same with prior art that typography of the present invention, design are painted original text and other printing, but when design the pattern of electrification aluminium geometric pattern not necessarily, according to which kind of pattern of client's needs can do, also only need convex-concave version that the figure line is arranged of system during plate-making.Make second convex epirelief version no longer in addition, promptly take a picture by the draft of design, the finishing egative film, exposure imaging on the photo zincography that scribbles sensitization liquid (above method for platemaking is the same with prior art processes) is brushed acid corrosion (not carrying out) to the version of the light that exposed to the sun then in the corrosion cylinder.Our acid solution prescription is: 21 °～23 ℃ of 12 °～22 ° (Be) fluid temperature of nitric acid, the forme degree of depth of brush erosion is best with 8～15.With the electrochemical aluminium forme that convex-concave figure line is arranged that makes, on thermoprinting machine, add suitable temperature during printing, adopt the conventional thermoprint of soft elastic insert.Like this because the effect of pressure and temperature, make stock (paper) easy deformation of being heated, thereby the recessed position of forme also can print off in the same old way, i.e. forme boss thermoprint is a plane gloss on paper, and forme recessed position thermoprint is protruding three-dimensional gloss on paper.Print order is according to the requirement of design look original text, can print other ink printing earlier, also can scald protruding printing earlier.Not only can print off the trickle electrochemical aluminium figure line of various complexity by these means, can also reach best refractive power effect.

Advantage of the present invention is: the forme of (1) brush erosion is shallow, the clean complete smooth plate-making quality that improved of trickle figure streakline bar.(2) during thermoprint as long as the depressed portions potential energy prints off not show money or valuables one carries unintentionally and can think that pressure is smooth, pressure is difficult to differentiate and fill up the trouble of inaccurate position when having reduced make-ready, and because the paper temperature distortion is big, the sense of figure line raised bodies is strong.(3) by above-mentioned two reason, make hot pressed raised carving arteries and veins road branch put in order clear, three-dimensional, refractive power embodies simultaneously, and product figure line is true to nature, the diffuse reflection phenomenon reduces, two-dimentional solid image is outstanding, more be imbued with the stratified sense of glittering, and has substantially exceeded the refractive power effect of prior art.(4) hot pressed raised carving is only used a forme, and the one-step print moulding has reduced the scheduling level, has shortened the cycle of product.Seal worker cost reduces by 50%, has also saved raw material greatly.(5) technology is easy, and home equipment can be produced, the good grasp, and easily penetration and promotion is applicable to middle-size and small-size printing producer.

Claims (2)

1, one-step print for hot pressed raised carvings is when the thermoprint electrochemical aluminum foil, makes its surface present the trickle figure line of various complexity simultaneously, only it is characterized in that with a convex-concave forme that the figure line is arranged, and scalds protruding one-shot forming.

2,, it is characterized in that the forme degree of depth is 8～15 according to the described one-step print for hot pressed raised carvings of claim 1.