"Live painting" is an interdisciplinary new subject that integrates the major of painting and printing. It uses a variety of painting techniques and different ink materials as a means of expression, breaking through the limitations of the traditional painting profession and broadening the field of painting materials. "Live painting" The appearance of this new star will have a huge and far-reaching impact on the art world and the screen printing world. Therefore, this product has very broad prospects, and its social and economic benefits are also inestimable. I hope that "live painting" will thrive in the art garden, and constantly design and create high-quality, high-grade "live painting" artworks.
The "live painting" artwork screen printing process is now introduced as follows:
1 Select Chinese painting manuscript
Landscape paintings, flower-and-bird paintings, animal paintings, decorative paintings, etc. are preferred to meticulous paintings; religious paintings (such as Guanyin Bodhisattva, God of Wealth, Buddha statues, etc.) use thick white lines.
2 Layout design
The color manuscript is scanned out of the film through electrical separation, and the layout is designed in the computer. The requirements are as follows:
1) Determine the size of traditional Chinese painting: it is divided into bucket square (68cm × 8cm), three feet (45cm × 90cm), and four feet (120cm × 65cm).
2) According to the characteristics of screen printing, the tone range is between 10% and 90%.
3) The shape of the dots is chain or dot.
4) The screen line number of 80 ~ 90 lines is suitable for screen-printed artworks, and it is not easy to see the dots when viewing.
5) Films must use positive films (positive pictures).
6) The screen angle of the color ink painting with warm colors as the main color is 90 ° for the yellow version, 45 ° for the magenta version, 75 ° (15 °) for the cyan version, and 15 ° (75 °) for the black version; The angle of the screen is 90 ° for the yellow version, 15 ° (75 °) for the magenta version, 45 ° for the cyan version, and 75 ° (15 °) for the black version.
3 Screen making
1) The four-color screen uses yellow polyester screen, and the ratio of the number of screen lines to the number of screen screens is preferably 1: 4. For example, the screen point of an 80-line film should be 320-mesh screen. The screen of the Buddha image should be screen mesh 80 ～ 120 mesh.
2) Use mechanical stretch net frame, preferably pneumatic clamp stretch net frame, which requires the tension of each screen to be the same. This needs to be measured with a tensiometer, the tension is about 20N / cm. The quality of the stretched net is very important, which directly affects the printing effect.
3) The diazo photosensitive latex uses water-based, short exposure time, high resolution photoresist.
4) Whether the screen frame is placed on the glass of the photosensitive table or on the screen printing plate, the electrodeless positioning card must be used in order to accurately register during printing.
4 Water-based slurry
After dissolving methylcellulose in water at 1:10, and then strengthening agent and ink or pigment, it is suitable for printing works such as Chinese painting. Or choose the "water-based four primary color dot printing paste" supplied by the market.
5 Paper product selection
Traditional calligraphy and painting paper uses rice paper. The quality of the paper is preferably pure, white, dense, loose and tough. Choose raw rice paper or cooked rice paper based on freehand painting or meticulous painting.
6 Printing process
1) Due to the strong water absorption and permeability of Xuan paper, the printing paste easily penetrates through the paper and leaks to the platen during screen printing, directly destroying the picture effect. Therefore, the wool felt should be placed under the rice paper before printing. Because the fluff on the wool felt surface lifts the rice paper and there is a layer of air cushion under the paper, the moisture in the printing paste will not leak, will not stick, not Will affect the printing quality.
2) The squeegee should be 3cm ～ 4cm larger than the screen.
3) First, use luminous silk screen ink to print the luminous Buddha image on rice paper, and then use four primary colors screen printing. The sequence of yellow, red (blue), blue (red), and black is better for water-based ink printing, because the depth of the black version is very important when printing Chinese paintings. When yellow, red, and blue lay the overall effect, Reprinting black ink can increase the density of the black plate. Using black to outline the lines, highlight the skeleton, play a finishing touch, can significantly improve the quality of the product.
4) After the four-color screen printing is completed, reserve a second set of three-color screen printing, and use light-variable screen printing ink, temperature-varying screen printing ink, changeable ink, fragrance screen printing ink, liquid crystal screen printing ink, etc. to perform partial overprinting.
5) The amount of ink scraped on rice paper depends on the dynamic pressure of the scraping plate. Therefore, the screen distance, scraping angle, pressure and speed of the screen and the table should be mastered, and the necessary adjustments should be made in time. After scratching, the ink return should be even.
6) The screen-printing "live painting" only needs to be naturally dried and then mechanically mounted and suspended.
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