Cold foil stamping is a process where an adhesive layer is applied to the surface of a substrate using a specific printing method. The cold foil is then pressed onto the substrate under controlled pressure, and after peeling, the aluminized layer from the cold foil is transferred to the area where the adhesive was applied. Unlike traditional hot stamping, this process does not require heat, making it a more energy-efficient and versatile option for various materials. Pre-Printing Considerations for Cold Foil Stamping When preparing for cold foil stamping, it's important to minimize the use of additives such as tack reducers, drying oils, and powders in the ink. Avoid applying a gloss coat before completing the cold stamping process if possible. It’s recommended to conduct small-scale tests before mass production to ensure the best results. Pay close attention to the compatibility between the cold foil adhesive and the foil itself. Whether using self-drying or UV adhesives, the coating amount should be higher than that used in standard offset printing. Choose a suitable cold foil, ideally a special aluminum foil without a heat-seal layer. Adjust the feeding speed and bonding pressure of the cold stamping equipment accordingly. Since cold foil adhesives have lower adhesion compared to hot melt adhesives, it may be necessary to apply a top coat to enhance the final appearance. Key Points for First-Time Cold Foil Stamping Use a specialized cold foil that is compatible with the printing process. The surface tension of the printed area should exceed 30 mN/m to ensure proper adhesion. During printing, avoid any ink smearing that could cause the aluminum layer to lift or become damaged. Ensure that the design remains clear and intact throughout the process. In summary, achieving successful cold foil stamping requires more than just high-quality tools and materials. It also demands the expertise and experience of skilled operators who understand the nuances of the process. With the right combination of equipment, adhesives, and techniques, cold foil stamping can deliver stunning, durable results that enhance the visual appeal of printed products. 　 The information above is taken from the second edition of 2012, "Printing and Printing Technology", Packaging and Decoration, and other journal content. For more details, please visit the journal channel.
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Sheet paper cold stamping process application notes
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