Reasonable use of the amount of background color removal has many factors that affect the tone reproduction of the image, and the sum of the dot coverage of the four editions in different periods is also different. In the 1970s, there were more single-color machines and two-color machines in China, and the gradation of fine printed products was 320% to 340% (yellow 80% to 85%, magenta 80% to 85%, cyan 85% to 95%, Black 70% ～ 80%); general print is 280% ～ 320% (yellow 70% ～ 80%, magenta 70% ～ 80%, cyan 80% ～ 90%, black 80% ～ 90%), Haier Electric, Germany The extension is provided as 240% (yellow 50%, magenta 50%, cyan 60%, black 80%), and the sum of the tones of the four editions of this expression differs by 120% between the longest and the shortest.
The main reason is that the printing suitability is different. If the same printing suitability conditions are printed with 240% and 360% tone, the product quality is definitely different. It is necessary to integrate various conditions and use the advantages and disadvantages reasonably. . At present, printing presses are developing towards high speeds and multiple colors, and the overall tone of the printing plate is developing towards a relatively short direction. High-speed multi-color machine printing newspaper (newsprint) total dot coverage area is controlled at 240% ~ 260%, the basic color is sufficient when making a plate, the opposite color is used less, the order is brand new, the network line is relatively thick, the background color is removed relatively large; Color wheel printing (offset paper or low-weight coated paper), the total dot area coverage is controlled at 260% to 280%, adjusted accordingly during plate making; multi-color sheet printing fine products (coated paper).
The coverage of the total dot area is controlled at 280% to 320%. Under normal circumstances, when making a plate, keep the bright tone or a little emphasis as much as possible, moderately compress or maintain the moderate amount, compress the dark tone, and the amount of background color removal is relatively small. Medium to dark tone levels. If the overall tone value is longer, the compensation effect of the black version is lost; the overall tone value is shorter, and experiments have been done, such as 220% (yellow 40%, magenta 40%, cyan 50%, black 90%) ), The results generally look gray and flat, the tone is stiff, and the middle tone is thin. If the total dot area coverage is too short, the product quality requirements will not be met, so the formulation of "the total coverage of four-color printed dots is controlled between 200% and 300% is better" requires research or experiment.
Scrubs can be divided into plant type, donkey milk type, essential oil type, pearl powder type, chemical type and flower essential oil type. Scrubs can be divided into facial and body treatments. An emulsifying cream containing insoluble solid abrasives used for deeper cleansing of facial skin. When using, massage the paste on the skin properly. While playing the cleaning role of oil, water and surfactant in the preparation, it can remove the difficult dirt and aging cuticle cells accumulated on the skin surface through the friction effect of apricot shell powder, nylon powder and other abrasives.
Best Body Scrub,Body Exfoliator,Body Polish,Homemade Scrub
DONGGUAN VOLES COMMODITY CO., LTD , https://www.volescommodity.com