Dry carbon paper printing technology in security paper (below)

V. Anti-sticking processing technology for web-page coding and spelling

When computer tickets are coded on a page, you should pay attention to the following requirements:

The control of the tension when producing multi-sheet bills must have an understanding of the shrinkage rate of each bill paper during production. When the amount of the bottom sheet matching dry-type carbon paper is different from that of dry-type carbon paper, the bottom sheet is To contradict, dry dry paper should be obeyed.

Dry carbon paper back coating contains wax material, it is not easy to absorb moisture and damp, but the printing surface is easy to absorb moisture and damp. The solution to this contradiction is: after printing, the printed product should be stored in a plastic bag and sealed, and then go to the matching page code .

Dry carbon paper is a physical type pressure-sensitive transfer hair color paper, non-chemical coating technology, marking the impression roller should be affixed to a single-sided tape to prevent the transfer of colored coating to the impression cylinder to affect the work of the code .

Six, stacked color security ink printing problems

Haitian multi-color security ink is developed by our factory according to the characteristics of anti-counterfeit ticket paper that can be transferred once. When the invoice is written, the handwriting is transferred to the invoice paper together with the colored transfer coating and becomes a stacked handwriting. It is not easy for the naked eye to detect. Only under the ultraviolet light, it displays colorful and vivid handwriting, so it can identify the authenticity of the invoice. Over the past few years, the application of tax documents in more than 10 provinces and cities, such as Jiangsu, Xinjiang, Hebei, and Shenzhen, has been effective.

When printing false-color-counterfeiting tickets, our factory's anti-counterfeiting inks can be properly added with 8# dry oil and red dry oil (additive weight is controlled at 3% by weight) in the southern region. If the ambient humidity is high, it can be properly added. Volume, otherwise it is appropriately reduced, printing ink is less. In the northwest and northeastern regions, the cyp404 white dry oil produced by the Tianjin Ink Factory can be added to the anti-counterfeiting ink of our factory. The amount of the cyp404 white oil is not more than 10% by weight, which can promote the good effect of drying the inner and outer layers of the ink layer at the same time. After printing the stackable transferable anti-counterfeit ink, the printed products should be spaced at a certain interval and the front of the invoice printed.

Seven, hand-open bills glue head adhesion problem

The backside transfer coating of Haitian brand dry carbon paper contains a wax composition that feels smooth when touched and printed. Therefore, the conventional general glue is used for rubber head glue binding during binding, and the effect is not good, and it is easy to fall off or stratify. It is ideal to use NYG--504 latex-based vinegar-propylene copolymer latex as dry carbon paper adhesive. Before dry the paper, dry carbon paper paper should be cut flat and flat on the stack (note that the top can't be heavily compressed to facilitate glue. Permeate) Brush the NYG-504 glue with a brush to the tip of the glue. After 2-3 hours, divide it into volumes.

The above printing technology for Haitian brand dry carbon paper is only a summary of the experience of tax printing companies nationwide from the year 2000 to the present. Many printing companies also have extremely rich advanced experience, and there are many uncertainties in printing. According to the actual situation of each factory in each area, different technical measures are adopted to solve.