In the printing process, how to make a batch of printed composite packaging bags or several batches of printed composite packaging bags to maintain the consistency of hue is the most basic requirement and an important problem. The consistency of the hue can only be said to be relative. Absolute consistency of the hue is impossible. Especially when there are many printing times, this batch may have color deviations. How to achieve color consistency involves many factors such as ink, doctor blade, printing plate and so on.

Through ink is to achieve color consistency

It is required that there is no deviation in the hue of the ink. First, it is best to use the same batch of ink. Because of different batches of ink, although some colors have little change, but some have changes, this requires a good check on the supply of raw materials. The consistency of the ink hue is the most basic requirement and an important condition. If the ink hue deviation is too large, it is difficult to control the consistency of the hue by other methods. When several colors are stacked together or the upper ink layer is thick, the hue The difference is obvious.

Secondly, it requires that the amount of ink added to the ink tray be less every time to keep adding new ink frequently, especially some patterns with less ink. If too much ink is added at one time, the ink will be used for a long time without new ink being added. The hue will change. For example, black ink that has been used for a long time has a gray color, which is not as pure as new ink, and red ink that has been used for a long time will become dark red and not as bright as new ink.

The third requirement is that the viscosity of the ink remains consistent from beginning to end, and it is best to control it with a viscosity controller.

Consistent color through scraper

The position of the blade contacting the printing plate has a great influence on the color, especially the hue of the light texture, so it is required that the blade is basically in the same position from beginning to end.

If the pressure of the doctor blade changes too much, it will affect the color of the shallow screen printing.

Consistent color through printing plates

The influence of the printing plate on the hue is mainly manifested in:

1. Blocking: At this time, the amount of ink transfer is reduced, which affects the hue. Therefore, it is necessary to clean the printing plate with powder removal to make it print in a normal state.

2. Abrasion of the printing plate: When the printing quantity of the printing plate is large, as the abrasion degree increases, its hue will change, and overall it will become lighter. In order to solve this problem, if the printing batch is large and the variety of printing in the field, you can dilute the ink in the new version, and then gradually reduce the degree of diluting as the amount of printing increases, until it is no longer dilute.

Hue control is mostly to control the mixing effect of multiple colors. In the specific operation, it is necessary to accurately determine which color has changed and the hue of the mixture has changed. This is a premise. If it is a judgment error, it is impossible to bring the hue to the correct direction. Combined with the above operations, it is possible to obtain a more satisfactory degree of hue control.

 

Women Wallets

Women wallets are so useful and helpful in lady's life. You can put coins and keys in the wallets and also your ID cards and credit cards. Designed in different kind of materials, the bags are so nice and beautiful. The bag can not only help you put your belongings inside but also can make your more attractive. With the top priority good quality and remorseless serivce, we are receiving more and more active feedback from our customers.Looking for ideal of Women bag Manufacturer & supplier ? We have a wide selection at goods prices to help you get creative. All the bags are quality guaranteed. We are China Origin Factory of Women Bags. If you have any question, please feel free to contact us.

Women Wallets,Multifunctional Bag,Personalized Women Wallets,Women Leather Wallets

Ningbo Qizhan Trade Co.,Ltd , https://www.qizhanshoes.com