In printing, how can we choose the same paper and ink without considering other technological problems? The gloss of some printed products is quite different. If we don't use the coated film after printing, there are many ways to improve the gloss of printed products
Gloss, as a kind of visual information, can have an important impact on people's mental state, mood and many other spiritual aspects, so people's research on color has been started very early. For customers, a certain product on a printed matter needs to be glossy. In addition to the glossy process, whether the light can be reflected in the printing, we also want to know.
1. Improve acid fountain solution.
The stronger the acid is, the more corrosive it is to the ink binder and pigment, resulting in the rougher surface of the imprinted film and lower gloss.
2. Reduce ink emulsification.
The ink emulsification in offset printing is mostly caused by the large amount of water and ink in the operation. The ink layer looks very thick, but the ink molecules are in the state of oil in water. After drying, the gloss is very poor, and a series of other faults will occur. Water ink is more taboo in offset printing.
3. Add appropriate auxiliary agent in the ink.
The printing suitability of the ink can be adjusted by adding auxiliary agent properly in the ink, so as to print smoothly. Most auxiliary agents have adverse effects on the gloss of the finished product, such as anti adhesion agent. The main raw material of anti adhesion agent is Liugu powder. After adding the ink, the surface of the imprinted film becomes rough due to the precipitation of corn flour, and the gloss of the finished product is poor.
4. Use dry oil correctly.
In the process operation, the correct use of dry oil is very beneficial for the finished product to form luster. This is because it takes a certain amount of time for the paper to absorb the binder. In this process, it is the key to make the binder condense as soon as possible until the conjunctiva is dry.
5. Pay attention to dusting.
Dusting, like ink, will also produce condensation, especially in bags or barrels with poor sealing. When dusting is damped, it will condense into larger particles and spray on the wet ink mark, making the conjunctiva on the surface of the ink layer rough and reducing the original luster. Therefore, dusting should pay attention to moisture-proof.
6. Adjust the machine correctly. Whether the thickness of imprinted ink layer meets the standard also has an impact on the gloss. For example, poor pressure regulation, dot expansion rate, ink layer thickness does not meet the standard, the finished product gloss is slightly poor.
Printing pressure is also the key to the transfer of good imprint. If the pressure is too large, the imprint will expand, the gloss will be weak, if the pressure is too small, the imprint will not be clear, resulting in the matte of the printed product, etc. These are some details that need to be paid attention to in the printing. Correct adjustment of the machine and whether the imprint ink layer thickness meets the standard also have an impact on the gloss.