Chocolate Boxes cold bronzing technology classification

Chocolate Boxes cold bronzing technology classification

With the development of the printing industry and the needs of applications in various industries, the application of Chocolate Boxes cold bronzing technology in the commercial market has gained greater demand and development. Cold bronzing technology is divided into dry lamination and wet lamination. ), the main production process is UV adhesive and special electrochemical metal foil, and the production technology of electrochemical foil without hot melt adhesive is relatively simple.

Dry Lamination

The early cold stamping technology used the dry cold stamping method. The dry cold stamping technology is to process the image on the substrate, and use a UV lamp to dry and cure the UV glue on the coated substrate to make the image sticky and immediately. Use the roller to transfer the foil to the adhered image and remove excess foil. The main process steps are as follows:

    1. Print cationic UV adhesives on web substrates.

    2. Cures UV adhesives.

3. The cold stamping foil is bonded to the printing material by means of a pressure roller.

4. Peel the excess hot stamping foil from the substrate, leaving only the desired hot stamping graphics on the adhesive-coated areas.

When dry cold stamping is used, the curing of the UV adhesive proceeds quickly, but it cannot be completely cured. It is necessary to ensure that it still has a certain viscosity after curing, so that it can be well bonded with the hot stamping foil.

Wet Lamination

The wet cold stamping method is to print the image on the substrate and coat the UV adhesive, and then use the pressure roller to attach the cold foil to the substrate, and use the UV lamp to dry the UV glue on the substrate to make the image sticky. Remove excess foil. The main process steps are as follows:

    1. Print free radical UV adhesives on web substrates.

    2. Apply cold stamping foil to the substrate section.

3. When curing free-radical UV adhesive, since the adhesive is sandwiched between the cold stamping foil and the printing village, the UV light must pass through the stamping foil to reach the adhesive layer.

4. The hot stamping foil is peeled off from the substrate and the hot stamped graphics are formed on the substrate. Since the wet cold stamping process uses free radical UV adhesives to replace traditional cationic UV adhesives; the initial adhesion of UV adhesives is stronger, and it can be sticky again after curing; and the metallization of hot stamping foils The layer should have a certain light transmittance to ensure that the UV light can pass through and initiate the curing reaction of the UV adhesive. Wet cold stamping technology can be on the printing press.

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