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The application of silk printing technology in lacquerware clay gold products

silk printing has been introduced into traditional industries, one of which is the lacquerware industry. Representative lacquerware products such as bowls, drawers and boxes can also adapt to modern lifestyles. Now lacquerware products suitable for various purposes have been developed, and the value of products has been improved through the implementation of various printing methods. Among these decoration methods, gold powder and silver powder are mostly used on lacquerware

1. silk printing and lacquer clay gold technology. Lacquerware clay gold technology is a method of spraying black paint and vermilion paint on the wood and plastic bottom, then painting patterns with paint on the surface, and then painting gold and silver before the paint dries and hardens. Among them, there are flat clay gold painting, high clay gold painting, and polished clay gold painting

clay gold process, when printing with silk, there are two kinds of manual and automatic, generally manual. The first process of clay gold is to make the designed pattern outline into a printing plate. In silk printing, this process belongs to plate making, so it is omitted. The following are described in order

2. printing equipment. For basins, drawers, boxes of plane printing equipment can. First place the plate on the stage, then put the lacquer ware on the stage and position it. After positioning, fix the lacquer ware. When printing in large quantities, it is necessary to have positioning and fixing devices (that is, dynamic performance can obtain high resolution. For example, the convex wooden table that can be inserted as a reference for customers) and the gap between the layout and the printing surface is 1 ~ 2mm. For the curved surface printing of can and bowl substrate, the circular silk plate is the center, the scraper is downward, and the substrate is upward. When the scraper, wire and substrate are in contact, the rotating force of the silk plate and the pressure of the scraper make the substrate rotate for printing

3. preparation of printing paint. Here is only a brief introduction to the paint mixing method. The paint itself cannot be used as an ink for printing. The viscosity of the paint is low, and it is easy to mix with bubbles, making the printing surface blister, which cannot meet the requirements of accurate printing. Therefore, in order to make lacquer up to 2: supercritical fluid foaming technology to achieve a good ink state in domestic mass production in 11 years, it needs to be modulated. Compared with other coatings, the drying conditions of the paint are completely different. It is dried by oxidation. Therefore, it is necessary to control the temperature and humidity. Viscosity adjustment of printing paint: mix iron oxide, titanium oxide, protein, anhydrous silicic acid, etc. with the paint, mix well, seal for 4 ~ 5 days, and the viscosity can be adjusted to about 500 poise, which can become the printing ink

4. drying time and clay gold time of paint (ink). The drying of paint is greatly affected by temperature and humidity. The best drying condition is 30 ~ 35 ℃ and 75 ~ 80% humidity. The clay gold time is proportional to the drying time. The greater the viscosity of paint (ink), the faster the drying

5. Printing accuracy. When the paint solution of the adjustment paint (ink) is more than 65% or less than 40%, it is not ideal as a printing condition. That is, when the paint solution is too much, the release is poor, leaving traces of paint. In particular, it can be clearly seen on the surface of the substrate and along the direction of printing. In addition, when the paint liquid is small, the fluidity of the paint is poor, the printing pattern surface is unstable, leaving wired traces, especially when the star product of StarTech rubber fatigue testing machine is printing gold and silver powder, this trace is very obvious. Generally, 250 ~ 300 mesh nylon is used for plate making, with good accuracy. Because the paint needs special drying conditions, it is not easy to block the holes of silk, and the printing operability is good

source: Guangdong Printing

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