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Screen Printing with international standards - screen printing, international standards, screen pri by sgbvdf asga
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Screen Printing with international standards - screen printing, international standards, screen pri by SGBVDF ASGA
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| Article Posted: 01/26/2011 |
| Article Views: 145 |
| Articles Written: 2044 - MORE ARTICLES FROM THIS AUTHOR |
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Screen Printing with international standards - screen printing, international standards, screen pri |
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Business,Business News,Business Opportunities
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ISO / TC 130/WG 3 N 257
ISO / WD 12642-5 International standard Title: Printing Technology Halftone color separations, proof and production prints process control
Part 5 Screen Printing Preface Production of halftone color reproduction, we must specify the color separation apparatus, proofer and press to print and other visual characteristics of a set of minimum technical performance parameters, in this way can the right to produce color separations and the color separations produced proofs, in order to simulate possible visual characteristics of printed materials.
To distinguish between the main parameters and secondary parameters, the main parameters of the provisions of this section refers to the direct impact on visual perception factors; only indirectly through changes in key parameters of factors affecting the image of the secondary parameters are:
Separations thickness Image direction (counter-reading, is reading)
Film polarity (yin yang diagram and map)
Emulsion surface roughness Standard color or positioning Printing materials First part of this international standard and explain the purpose of an enumeration of the set of halftone color separations related to technical performance, production of halftone proofs or printed materials required for a minimum of process parameters.
Part 5 of this International Standard aims to list the provisions of the first part of the standard set of key parameter values and by a set of halftone color separations produced by halftone printing technologies related to product performance, also proposed a secondary parameter indicators.
The rest of the international standards related to offset printing, press printing, gravure printing.
An international standard specifies the use of platform screen printing or roller printing method of printing four-color printing production of finished products, the preparation of four-color screen printing color separations applied some of the process parameters and parameter values.
Process parameters and parameter values are based on the technology chosen, covering color separation, plate, proof production, print production and surface finishing the procedure.
This part of the international standard IS012674.
2 Normative references Following standards contain provisions which, through reference in this standard, constitute provisions of the standard, the standard time of publication, the editions indicated were valid. Set all the standards will be modified to use wood standard should discuss the use of the latest version of the likelihood of the following criteria.
ISO 2470:1977 Paper and board a blue grass diffuse light reflection coefficient of determination (ISO brightness)
ISO2846-4: 199X print technology?? Printing ink layer of the color and transparency of the technical requirements: Part 4 Screen Printing
ISO DIS 12 637 / 2:1997 printing technology?? Printing technology terminology Part 2: Screen printing terms
ISO2647 / 1:1996 printing technology?? Halftone color separations, proof and print prints processing and process control?? Part 1: Parameters and measurement methods
ISO 5-3 3 Definition The standard use of ISO 12647 / 1:1996 Part 1 and ISO12637 / 2:1997 printing technology? Part 2: Screen printing terms.
4 technical requirements 4.1 color color separations 4.1.1 quality color color separations
Network transmission density of at least the center than the transparent film base of the transmission density (film base plus fog density transmission) is 2.5.
Large field region than the density of at least a transparent film base density of 3.5. The transmission and transparent film base density shall not exceed 0.10. Density should be used above were determined UV density meter, density meter spectra ISO5-3 D1-type specified.
If the density filter with a blue transparent film-based Measurement of the density (density plus fog film Tomb), its density can not be greater than 0.05.
Network edge width not larger than the width of 1 / 40. In significant regional, network can not have faults. The width of the edge network according to the first part of Appendix A ISO12647 proposed method were determined.
4.1.2 screen lines For four-color printing, screen lines (cable frequency) generally between 20/cra-40/cm. If more than 20/cm-40/cm the scope of the basic requirements of this standard is still valid.
4.1.3 Screening perspective In the vertical coordinate system, blue, magenta and black edition of screening angle difference 30 ° -60 °, yellow version and the other color version of the screening angle difference of 15 °. Main color version of the screening angle of 45 °. Web silk screen angle is 0 ° and 90 °.
4.1.4 dot shape and tone values corresponding
Using the elliptical dot, in tone less than 35% of the value of the first connection took place, the second connection will have to order in less than 60% of the value adjustment took place.
4.1.5 image size tolerance
Environment in general equilibrium, for the same set of color separations, its poor image diagonal length of not more than 0.02%.
4.1.6 the sum of the largest tone
The largest sum of tone values should be 300% -400%.
4.1.7 Gray Balance
Gray balance by the following values in each group given tone: I am China Toys Suppliers writer, reports some information about his masters voice , truss rod cover.
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