Brands want to achieve metal effects on 360° coated patterns
With more With the introduction of label decoration technology, the use of supermarkets' crowded shelf space for consumer appeal has become more intense. Shrink sleeves for optimal visual effects in any shape The 360° decoration on the packaging container is favored by the brand. If you can also stamp the anodized aluminum on the shrink sleeve, you can add a soft metallic effect to make it have a stronger visual impact. In addition, the textured surface formed with a special-effect coating, as well as matte or high-gloss inks, provides a contrasting visual effect between the high-gloss shrink film surface and the brilliant anodized aluminum. Therefore, many brand managers hope to achieve a metallic effect on the shrink sleeve to show a more luxurious appearance. However, if the hot stamping process is used, many plastic residues will be generated during hot stamping, and the cold ironing process seems to be more feasible.
How to ensure that the cold stamping position does not wrinkle
Cold stamping on the shrink film requires Printing machine configuration cooling roll, the UV light box is also required to cure the adhesive used perm. The adhesive is formulated with a heat-shrinkable binder that is pressed together with a substrate by a hard pressure roller and lamination device. In addition, it is necessary to configure an electrochemical aluminum unwinding and a waste foil rewinding device to complete the hot stamping process.
Most shrink sleeves use acrylic-based cold foil adhesives, but when the labels shrink on the container, the adhesive will cause wrinkles in the shrink sleeve, so it is necessary to ensure that the adhesive has shrinkage. K-Laser and UVitec are able to provide adhesives with shrinkage capabilities. When printing is started need screen ruling and a volume of about anilox network points 500lpi / 5bcm, once the print setting after a good optimization, the network can be replaced by corrugated rolls 600lpi / 4bcm of.
If cold stamping is performed in a region where the shrinkage ratio is relatively large, a texture pattern such as a diamond shape or a tapered line may be used to ensure that the hot stamping foil shrinks without cracking.
How to achieve fine cold
Not all embossing rolls are the same, and cold scalding requires a higher hardness embossing roll to ensure a fine hot stamping effect. If you want to confirm the hardness of the platen roller, you can use the nail to try to squeeze it. If the surface of the platen roller is deformed when squeezed, it means that the hardness is not enough to achieve fine stamping of details. Generally, the pressure roller used for cold ironing has a hardness of 85 to 90.
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