Hot stamping, also known as hot press printing, is a general term for printing various foil graphics on the substrate by heating and pressing. According to the different hot stamping materials, it is divided into gold foil hot stamping, silver foil hot stamping, lacquer film hot stamping, powder hot stamping, anodized aluminum hot stamping, etc. Raised hot stamping, level hot stamping, etc. Foil hot stamping is a type of hot stamping. The foil material usually includes various types of gold foil, silver foil, copper foil, powder foil and so on. When hot stamping is carried out, the foil needs to be cut into strips according to the size of the graphic area, and then laid on the graphic part of the printing plate, and then placed on the printing part, and finally pushed into the hot foil machine to heat and press The foil on the picture is firmly attached to the substrate. The characteristic of hot stamping is that the printed pictures and texts are bright in color, bright and eye-catching, splendid and precious, and the printed pictures and texts are not easy to fall off. Foil stamping is mainly used for the appearance and decoration of packaging boxes of high-end food, beverages, supplements, medicine, clothing, gifts, etc.
The quality of hot stamping depends largely on the correct selection of hot stamping foil materials. Different hot stamping methods, hot stamping processes, and even different hot stamping graphics have strict requirements on the foil material used. The foil material used must match the material of the printing material. In addition, in the hot stamping process, the requirements for temperature and pressure control are extremely strict. In other words, it is quite difficult to achieve perfect hot stamping quality. Recently, an expert from the die-cutting and hot stamping of the cardboard box of the folding carton department of the world ’s largest multinational company, Bobst Group, Inc., a subsidiary of Bobst Group, wrote about the key to high-quality stamping. This article makes a brief introduction to what it talks about, in order to learn from relevant readers.
Foil hot stamping is used to match the surface decoration of the product packaging carton, which can significantly enhance the gloss and shininess of the carton decoration, making it bright, colorful, and more luxurious. On the shelves of the supermarket, among the dazzling and colorful packaging products, the high-end packaging carton with foil foil stamping decoration is more dazzling, eye-catching for a long time, forming a strong goodwill and desire to buy, which has greatly increased The competitiveness of beautifully packaged goods. If you have just been engaged in the production of foil hot stamping plants, or considering preparing to enter the technical field, let us discuss a few related issues together, which may make you less detours on the road to beginners.
In order to obtain the perfect high-quality foil stamping effect, we must first carefully and comprehensively plan and process the processing process, that is, from the structural design of the carton, graphic design and layout, to the stamping surface The final decoration must be correct. The selection of hot stamping foil, the accuracy of foil bonding and the accuracy of molding are very important. The die cutting and measurement data must achieve the highest possible accuracy. In addition to this, it is necessary to ensure the precise position of the foil. If there is an error in the position of the foil, the high accuracy of the molding will not help.
Specific hot stamping operators and quality control personnel must undergo special technical training and require the necessary relevant knowledge. Because this high-tech foil hot stamping technology requires skilled workers with sufficient professional knowledge and rich practical experience to be competent. Operators and quality control personnel are usually encouraged to spend more time studying, researching, and exploring foil stamping technology and processes, constantly summing up the positive and negative experiences, continuously improving the operation skills and technical level, and improving the production precision and Quality level.
For those who are new to foil stamping, one of the most difficult and important issues is how to choose the most suitable foil material correctly. Generally speaking, the beginner foil stamping people often think that the correct choice of hot stamping color is the most important, but the fact is the opposite, because the correct choice of the most suitable foil material is far more important than the correct choice of color. The key to choosing a foil material correctly is that one of the selected foil materials must match the material of the substrate, and the other is to meet the processing requirements. These two points play a decisive role in the quality of foil hot stamping effect.
The hot stamping effect obtained by choosing different types of foil materials is also different. Foil materials purchased from different suppliers also have different degrees of difference in color and processability, so carefully examine the creditworthiness of the foil supplier to ensure that the selected foil is not only of high quality, but also needs to meet Corresponding process requirements. In addition, before beginning the hot stamping process, you must obtain the user's approval of the foil you choose, so as to avoid problems caused by inconsistent material selection and unnecessary economic losses caused by replacing the foil material .
It is also very important to choose the foil material correctly according to the specific conditions of the printing member. The requirements for hot stamping foils are different between coated substrates and uncoated substrates. Some hot stamping foils are specially made for substrates with surface coating or surface printing layer, and Some hot stamping foils are specially used for hot stamping of other textures.
Some printing parts require printing first and then foil stamping, and some printing parts require printing first and then foil stamping. Regardless of whether the foil is hot-pressed before or after printing, it must be ensured that no wax or oil marks are present on the surface of the foil that needs to be hot-pressed, and a pressure of 38 dyne or higher is required. Before foil stamping, the coating and printing ink on the surface of the printing member must be completely dried out before foil stamping can be carried out. In addition, there are many types of coatings or inks on the surface of the printing parts. When foil hot stamping is performed on a specific coating or specific printing ink, the hot stamping foil material must be selected to match it. The characteristics of the layer or printing ink are specially formulated to customize the corresponding hot stamping foil. Only in this way can the quality of the foil hot stamping be guaranteed. Therefore, it is recommended to discuss and unify the best matching plan between the paint supplier, ink supplier and hot stamping foil supplier before implementing foil hot stamping, so as to avoid mismatch due to material properties And the quality problems that arise.
When correctly selecting suitable hot stamping foil materials, the hot stamping process and the design of the carton are also two important factors that should be considered. If a large area of ​​hot stamping is used, the hot stripping foil material that is easier to peel off can be used; if the hot stamping area is small, the hot stamped graphics are thin and thin, such as hot stamping text or lines, the texture must be selected Hot stamping foil which is firm and not easy to peel off.
When selecting hot stamping foil, the flat pressing hot stamping and rotary hot stamping use different foils. The formula and production of hot stamping foil are strictly targeted. According to the different hot stamping processing techniques and processing methods, there are strict differences in the foil materials used. In addition, in the hot stamping process, it is very important to accurately calculate and determine the correct time to maintain the maximum thermal pressure. Different hot stamping processes and processing methods require a large difference in the maximum hot pressing time. Under the conditions of high-speed hot stamping processing, the maximum hot-pressing time of flat-type hot stamping is significantly longer than that of rotary hot-pressing. Therefore, the foil material used for rotary hot stamping should have easier or faster mold release performance than the foil material used for flat hot stamping. It is important to select the right hot stamping foil material according to different hot stamping processing speeds.
In short, we must strictly monitor the whole process of foil hot stamping processing, and process hot stamping products of high quality and fully meet the requirements of users, so as to win the trust of your users, and establish your status as a hot stamping expert in the user ’s heart, so as to avoid Users question your hot stamping quality and cause you to cause unnecessary losses in the economy, but also help to strengthen the good relationship between you and customers.
Whenever possible, you should choose and determine the type and quality of the hot stamping foil material you use as accurately as possible. In the field of hot stamping for high-end carton packaging foil, if you are the most convinced expert of users, you must strictly control the quality of material selection and the entire process of strict processing technology and quality control. Allowing others to choose and determine hot stamping foil materials will reduce your choice, delay production and seriously affect the quality of the final product.
Your supplier of foil materials may be your best source of information and best counsel when it comes to choosing and determining the foils you need. If possible and time permits, it is best to provide the hot stamping foil material supplier with the sample of the printing material you want to stamp in advance and let them provide you with the best matching hot stamping foil material.
Take the time to research and understand the root of hot stamping technology and hot stamping process, analyze and eliminate the shortcomings in hot stamping processing, on the basis of correct selection of the most suitable foil material, in order to succeed in hot stamping To produce perfect products with high quality and beautiful patterns.
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