Metal plates _ plates _ metal plate printing color difference control method

Metal plate printing color difference control method in sheet metal, sheet, foil materials as substrates, such as printing plate products, known as the metal plate printing. In the process of metal plate printing, often encounter print existence chromatism. Metal printing plate process will appear under the control of color difference method simple introduction: in the process of the metal plate printing, printing products of color chromatism mainly includes: ink color, fold, every node deformation chromatic aberration, chromatic aberration caused by misregister, wetting system exceptions the brightness of the photo, color plate printing and glazing color difference arising from the production process, etc. A. Solid background poor: ink such as color or color ink, solid color difference of the main causes are: (1) hue deployment of inaccurate, choose the type and proportion of ink proportion is unreasonable, can not adapt to the printing requirements; (2) the nature of ink printing and printing machine, dryer performance does not adapt, (3) ink color and ink layer thickness is not appropriate or the ink quantity size. Control method: (1) to collect data in the process of metal labelthe actual printing, clear the relationship between the ink layer thickness and density, good control when printing ink and ink; (2) the ink printing eligibility shall conform to the objective conditions, the printing ink viscosity, liquidity, according to the properties of the substrates, the machine speed, by category, etc. Field printing machine speed,, require ink viscosity is relatively smaller, liquidity is relatively larger, whereas the opposite; (3) for the first time when the deployment of ink to print sample as the standard, conditional word based ink hue standard database, as the standard basis after deployment. 2. Fold: every cable and solid bottom, fold the colored difference reasons are: (1) color sequence arrangement is unreasonable; (2) ink viscosity instability; (3) ink imbalance, adjust the ink fountain, a vase is not reasonable, operation is wrong. Control method: (1) control the ink layer thickness, ink viscosity; (2) the reasonable arrangement of metal signs printed order: generally color printing first, after the color print. Network coverage in low color printing first, network coverage after printing, high color version checker first printing, printed after the real blank. High viscosity of the ink printing first, dark jump, light color after printing. First printed graphic area of less, by large area after printing. Lightness and dark jump, tall lightness after printing. Actual and color sequence adjustment according to different content and characteristics; (3) adjust good ink fountain, chicken pox, control the ink balance. 3. Dot deformation: color dot deformation cause of color difference are: (1) mechanical outlets increased or reduced, including printing pressure, printing ink, embellish version of liquid, the influence of rubber cloth, metal surface coating; (2) optical node enlargement or narrowing, refers to the metal plate printing plate in the process of transfer to PS version of network changes. Control methods: (1) to adjust pressure conform to the requirements of the printing, such as stress, metal labelplate will appear by expansion, dot imprinting couldn't level caused serious when fall edition, impact resistant force. Pressure is too small, plate in lis, imprinting clarity is poor, outlets emptiness; (2) control ink viscosity; (3) control the education version liquid PH, conductive value; (4) rubber cloth accord with a standard installation, to prevent the occurrence of tensile rubber cloth, reverse, or network resulted from the compression deformation of change; (5) precise control exposure time, to ensure the reduction of the film. Four. Misregister the brightness of the photo, the main reason is that various version in the process of overprint position is not accurate. Control method: (1) conform to the requirements of the metal plate printing pressure adjustment, contain a variety of gasket; (2) gauge, side gauge, diao teeth before positioning accuracy; 3. Install PS version conform to regulations; (4) calendar size reduction film size; (5) all version between positioning accuracy; 6 metal labeldimension precision meet the national standards, in line with the equipment performance.

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