thermoprint
Hot printing is the unique pattern on the printing, text hot printing electrochemical aluminum metal foil, through the unique metal luster of the electrochemical aluminum to print the decorative role of the finishing point. Nowadays, hot stamping technology is increasingly mature both from the process or from the material, carefully carved hot stamping plate, rich and colorful aluminum makes the printing more delicate, more tasteful, colorful, exquisite. Holographic positioning special edition hot printing, because of its process difficulty coefficient, difficult to prevent, but also play a good role in anti-counterfeiting.
Hot stamping is divided into hot hot and cold hot:
Hot hot is the use of electric carved copper plate, corrosion version (copper plate, zinc version), silicone resin version, etc., in the special bronzing machine through heating pressure to complete the pattern text transfer;
Cold ironing does not need to use special bronzing machine and special hot stamping version, but the use of the first printing on the specific pattern, text printing UV adhesive, and then affixed with special bronzing foil, UV photofixation, complete the pattern text transfer.
Cold hot process can be divided into dry film type cold hot and wet film type cold hot, most manufacturers use wet film type cold hot.
Hot for notes:
(1) bronzing foil (aluminum electrochemical): the appearance quality, color, stamping temperature, stamping fastness, stamping adaptability and other indicators of aluminum electrochemical can meet the technical requirements.
(2) Printing plate: electric engraving copper plate, corrosion plate (copper plate, zinc plate), silicone resin plate, etc., the hardness, thickness, flatness, thermal conductivity and bottom mold thickness of the printing plate and other indicators meet the process requirements.
(3) Workshop temperature and humidity: the workshop shall maintain a certain temperature and humidity, the temperature is 18~30℃, and the humidity is 50 ~ 65% RH. The temperature and humidity change is too large to make the paper deformation warping, resulting in inaccurate overprinting, serious will affect the latter process.
Hot requirements
① High-speed automatic bronzing machine to choose the rubber layer of relatively loose aluminum electrochemical, low-speed bronzing machine or formalities machine to choose the rubber layer of relatively tight aluminum electrochemical. The rubber layer is easy to cause "flower plate" phenomenon; the rubber layer is prone to "flying gold" phenomenon.
② Hot printing temperature to electrochemical aluminum film layer is easy to peel, do not paste the fan word, do not lack of stroke, do not change the electrochemical aluminum metallic luster is appropriate. The temperature is too low; the temperature is prone to paste, and the temperature will make aluminum aluminum lose metallic luster.
③ Hot printing pressure in the graphic imprinting transfer complete, firm, no paste version of the fan word lack of stroke, convex round, three-dimensional strong (hot stamping pressure convex once complete), the smaller the pressure, the better. Excessive pressure graphic imprint transfer is incomplete; excessive pressure is prone to pasting.
④ In the process of hot stamping, do often see the sample, frequently wipe the hot plate.
⑤ Overprint is accurate, overprint error within the standard requirements.
Cold hot requirements
① In cold hot stamping, UV adhesive coating should be evenly and flat, otherwise it can lead to uneven metal foil surface and diffuse reflection, affecting the color and gloss of the hot stamping drawing.
② As far as possible to reduce the printing surface powder or printing products to do clear powder treatment, in order to eliminate the powder caused by aluminum electrochemical attachment and surface gloss reduction and other diseases.
③ Check the power of the ultraviolet lamp regularly to avoid the failure of aluminum attached due to insufficient power.
Pressure concave and convex
Pressure concave and convex use of electric carved copper plate, corrosion version (copper plate, zinc plate), or resin version, in the die cutting machine through pressure or heating and pressure, so that the specific pattern on the printing text plastic deformation, forming a three-dimensional effect, enhance the beauty of the printing.
Note for compression and relief:
(1) Printing plate: the hardness, thickness, flatness and the thickness of the bottom mold and other indicators of the printing plate meet the process requirements.
(2) Workshop temperature and humidity: the workshop shall maintain a certain temperature and humidity, the temperature is 18~30℃, and the humidity is 50 ~ 65% RH.
Pressure concave and convex requirements
① The convex round, strong three-dimensional sense, in the pressure under the case of appropriate pressure.
② For the text stroke fine relief pattern can be properly heated.
③ In the process of convex, see the sample and wipe the convex plate.
④ Overprint is accurate, and the overprint error meets the standard and customer requirements.
⑤ Other indicators can meet the standard requirements.
die cutting
Make the printing on the special die cutting machine; according to different models, it can be divided into flat die cutting, round flat die cutting, round die cutting.
Die-cutting precautions:
(1) Die cut plate: high density wooden die cut plate, Sanming steel template, resin steel template, online mold; the technical indexes of die cutting knife peak, point line knife distance, indentation steel wire, corresponding bottom template, die cutting rubber strip and other supporting substances meet the process requirements;
(2) Workshop temperature and humidity: the workshop shall maintain a certain temperature and humidity, the temperature is 18~30℃, and the humidity is 50 ~ 65% RH. Temperature and humidity change is too large, easy to make the paper deformation, resulting in overprinting is not allowed, serious will affect the later process.
Module requirements
① The full-page pressure is uniform.
② The specifications and sizes of the finished products are strictly according to the requirements of the drawings, the finished product box shape is regular, the length specification error, width error, symmetry error and so on are attached to the standard requirements.
③ The product incision is smooth, smooth and solid, emphasizing the paper without crushing; the pressure is even, undamaged, easy to fold (applicable for high speed packaging machine); the dispensing line is clear, uniform and neat, the depth is 1 / 2 paper thick; the indentation width of cigarette card (230~250g / m2 card) is 1.0~1.2mm, the indentation depth of tongue parts is 0.16~0.18mm, the depth of parts is 0.14~0.15mm in other; the indentation width and depth of other kinds of products (different paper thickness) shall be adjusted according to the specific situation.
④ No ink layer on the printing surface (no explosive color phenomenon); no burst after composite paper crease.
⑤ For products suitable for high-speed packaging machine (it is not necessary for products not on high-speed packaging machine).
Source: http://news.naliyin.com/
