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hot stamping process Self-adhesive label printing factory printing label printing hot stamping process
- May 11, 2018 -

First, bronzing method

    According to the processing method of self-adhesive labels, the bronzing method is divided into sheet-fed bronzing and web bronzing. The sheet-fed bronzing process is the same as the traditional bronzing process and is processed on a special gilding machine. Web bronzing is accomplished on the label linkage mechanism and is the most widely used processing method. At present, there are several methods for stamping the reel material of a trademark printing factory:

  1. Flattening and stamping on the labeling machine: Regardless of whether the letterpress labeling machine is flat or flattening, because the web is fed intermittently, all the gold foils are flattened. In general, the stamping station is an independent unit, and there are also some models of bronzing that share one unit for die-cutting and are used separately.

  2. Multi-station flat press hot stamping: Some models have two. Hot stamping units, such as Shilki's SMHC-45-MWL labeling machine, one unit is close to the printing plate, horizontal bronzing is completed, and the other unit is Independent unit, complete vertical bronzing. The model can be double-colored at the same time.

  3, the processing machine flat pressure flat stamping: Plus: The machine is designed to add: After the print roll label and no need to print the label design. Hot stamping is a processing machine - a function, the hot stamping device on the processing machine is generally flat and flat, its working principle is the same as the above label machine.

  4. Rotary round bronzing on the rotary machine: The bronzing version used for the round press bronzing is in the form of a drum. When the bronzing is in contact with the impression roller, the bronzing is achieved. Round round hot stamping is suitable for use on continuous transfer paper label converting machines, but it has certain requirements on the paper feed speed, that is to say it has an impact on the printing speed. However, compared to the flat bronzing, the efficiency has been greatly improved. Round press hot stamping roll is expensive to manufacture, so it is only suitable for long live stamping.

  5, cold press on the rotary machine: This is a new hot stamping process, no longer use the heated metal plate, but the use of printing adhesive method, so that the transfer of metal foil, to achieve bronzing. The process flow is: First, the UV-sensitive adhesive is printed on the location where the printed product needs to be gilded, the adhesive is dried by the UV drying device, and then the special metal foil is used to compound the pressure-sensitive adhesive, and then the metal foil is peeled off. The part of the metal foil that needs to be transferred is transferred to the surface of the print to achieve cold stamping. The cold bronzing process is low in cost, saves energy, and has high production efficiency. It can utilize existing equipment components without adding additional devices. It is a promising new process.

Second, first hot gold and hot gold

  The label printing factory adhesive bronzing is also divided into the first bronzing and the later bronzing. The first bronzing is the first bronzing on the labeling machine, and then printing; then the bronzing is the first printing, and then the bronzing. The key to bronzing and post-bronzing is the dryness of the ink. Hot stamping patterns and

There are two situations in the relationship between printing patterns: side-by-side and overprinting. Because of the different inks used, the labels must be printed using the first and second hot stamping processes respectively.

  1, the first hot stamping process: When using intermittent paper feeding stamping parts installed in the front of the labeling machine using ordinary ink printing labels, using the first hot stamping process, because the ink used is oxidative polymerization drying type, the ink layer after printing is completely dry For a certain period of time, the bronzing pattern must avoid the ink. The best way to avoid ink is to pre-bronze the roll material and then print it.

  The use of the first bronzing process requires that the printing pattern and the bronzing pattern be separated (side by side) because the surface of the galvanized aluminum is smooth, free from ink, and cannot be printed. The first hot stamping can prevent the ink from getting dirty and ensure the label printing quality.

  2, after the bronzing process: After the bronzing process is used in the hot stamping components installed in the back door of the label machine, printing using UV ink. The web material is printed first, and the ink is instantaneously dried by a UV drying device, and then gilded on the surface of the ink or the ink surface after the ink is dried. Since the ink is dry, the hot stamping pattern and the printed pattern can be either side-by-side or overprinting, and no ink pick-up will occur.

    Two kinds of gilding methods are ideal methods for post-bronzing, which also brings convenience to the label pattern design and expands the application scope of hot stamp patterns. However, due to the limitations of various functions, the cost of label printing is relatively high. The first hot stamping process is suitable for the processing of small labels with simple patterns. The low cost and wide application range make it a common method for small and medium-sized trademark printing factories.

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