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Sticker The label consists mainly of a three-layer structure: facestock, adhesive, and backing paper (coated with a layer of silicone oil). The ideal condition for die cutting is that the die cutter cuts through the adhesive layer, but does not destroy the silicone oil layer, which is called "precision die cutting." However, in the actual production process, it is impossible to achieve this ideal condition due to the influence of self-adhesive materials, tools, machines and operators. It is often the case that the bottom paper is cut through, the die-cut spacing is unstable, and the die-cutting process is out of the standard. And the phenomenon of poor waste. Below, the author will analyze the different problems that arise during the die cutting process and provide solutions.
Undercut paper
If the problem of the cut-through of the bottom paper is generated by the circular die-cutting method, it can be solved by reducing the die-cutting pressure first. If the problem still exists after reducing the die-cutting pressure, then it is necessary to consider grinding the round knife; if it is produced in the flat-die-cut mode, there are several possible reasons to consider:
1. Self-adhesive material problem
Self-adhesive materials have very high requirements for flatness. Some small material manufacturers did not master the uniformity of the coating when applying the adhesive, resulting in uneven thickness of the adhesive layer. Self-adhesive labels produced from this material can easily cause undercutting problems during die cutting. The die-cutting fault caused by this reason usually shows irregularity, that is, the phenomenon of cutting through the bottom paper and not cutting through the bottom paper will occur disorderly if the die-cutting pressure is not changed. It is recommended to replace the self-adhesive material in case of such problems.
2. Die-cutting substrate material problem
Most flat die-cutting equipments need to be die-cut under the die-cut material to avoid direct contact between the die and the underlying steel plate, thus extending the life of the die. In general, the die-cutting substrate needs to be made of a material that is moderately soft and hard, has a certain elasticity, and has a flat surface. If the surface strength of the die-cutting substrate is not enough, it will be easily deformed after being impacted by the die in the die-cutting process, thereby causing partial pressure change of the die-cutting, resulting in the cut or even cutting of the bottom paper.
When encountering such problems, it is often difficult for the operator to find out the real cause, because the deformation of the base material is not regular. If the operator finds that the bottom paper is cut during the production process, it will immediately adjust the partial pressure. It can not be adjusted for a long time, and it is found that the bottom paper is also cut at other locations. Repeatedly, the problem was solved until the die-cutting plate was replaced. Therefore, when adjusting the partial die-cutting pressure can not solve the problem of the cut-off of the liner, the worker can try to change the die-cut substrate of other materials to see if it is effective.
3. Die cutting blade becomes dull
During the die cutting process, as the number of die cuts increases, the die cutter gradually becomes dull. In order to continue cutting off the self-adhesive material, it is necessary to increase the die-cutting pressure, which is easy to cause damage to the base paper. The damage of the bottom paper is mainly manifested by the deep die-cutting mark on the surface of the bottom paper. Although it has not been cut through on the surface, it has actually destroyed the fiber of the paper, resulting in greatly reduced tensile strength during the automatic labeling process. It is very easy to cause the bottom paper to break. Therefore, in the die cutting process, the operator is advised to replace the blade immediately if it finds that the surface of the backing paper is too deep.
Microblading Pigment
Microblading Tattoo Ink : Tattoo inks consist of pigments combined with a carrier, and are used in tattooing.
Tattoo inks are available in a range of colors that can be thinned or mixed together to produce other colors and shades.
Most professional tattoo artists purchase inks pre-made (known as pre-dispersed inks), while some tattooers mix their own
using a dry pigment and a carrier.Tattoo ink is generally permanent. Tattoo removal is difficult, painful, and the degree of
success depends on the materials used. Recently developed inks claim to be comparatively easy to remove. Unsubstantiated
claims have been made that some inks fade over time, yielding a "semi-permanent tattoo."