With the booming development of the printing and packaging industry, people are paying more and more attention to post press processing, die-cutting production, and the application of die-cutting materials.

In the Hong Kong market, there is a fierce market competition among various die-cutting knives. At the same time, various brands were dazzling, providing customers with ample choices, but also increasing the difficulty of selection. How can users choose the good among so many brands and follow them? What about distinguishing between high-quality and low-quality die-cutting knives?

1. A blade that has undergone quenching treatment is commonly referred to as a soft blade due to its soft blade and hard blade. In soft knives, the thickness of the quenching treatment area has a significant impact on durability. The larger the quenching area, the greater the ability to support the mechanical pressure transmitted from the blade. Conversely, when the contact area between the harder blade peak and the softer blade is less, the hard part will sink into the soft part or easily fall off, resulting in insufficient or reduced support, which shortens the life of the knife. Of course, there is no unlimited increase in the area of the quenching layer, as too much quenching layer area can affect the bending of the die-cutting blade. Due to the importance of the quenching layer and the fact that the larger the area of the quenching layer, the higher the cost of the knife, some unscrupulous manufacturers even use the method of painting a layer of ink on the peak of the knife as quenching treatment to deceive users. As a user, one should have a clear mind and not be deceived by counterfeit knives.

The higher the precision of the die-cutting blade, the better the quality and the higher the grade. Taking the Bohler die-cutting knife from Austria as an example, its accuracy can reach ± 0.02mm, and the accuracy of Class A, B, and C knives can also reach ± 0.007mm. For example, if Class A knives are used for a long time, the accuracy of Class A knives can reach ± 0.007mm (the same for Class B and C knives), which is convenient for users. As long as the user specifies to purchase the same type of knife, the price remains unchanged, and the accuracy deviation is often within ± 0.08mm. However, ordinary backing paper is only 0.05mm thick, and the tolerance is too large to be compensated with backing paper. Especially for adhesive die-cutting with extremely high precision requirements, these rough die-cutting methods are fundamentally unqualified.

3. Choosing varieties with different hard bottoms is beneficial for adapting to different needs. Some brands only have one or two hardness knives, which are not suitable for cutting thicker materials. On the other hand, if there is only a very hard knife, it is also a problem for molding complex patterns in wooden molds. Sometimes users may reluctantly use the same knife for die-cutting production with different requirements, failing to achieve the best results, so choosing multiple varieties is a characteristic of high-quality brands.