Screen Printing industry standards should be aware of printing
Whether or not realize that they must follow the standards for color reproduction. Although these standards are widely accepted and used, but with screen printing nothing special and complex features. The following discussion focuses on the essence of color standards, review for special imaging methods to develop a standard type, and screen printing industry study in the use of the printing industry by other standards acceptable to the problems faced by them.
The basic principles of screening printing
Most color images are three basic factors: substrates, ink density and color space. Types of substrates (paper, plastic, etc.) and the color of the substrate (especially its brightness level) affect the performance of printed images. Ink density, or the actual print color or color will also affect the results. The first three factors, namely color area, means to generate specific tones, or dark colors, dot reproduction accuracy. These are objective factors that control the color image.
Course, screen printing, there are other variables. This is a lot of subjective factors must not be ignored. A very important variable is the condition of color, that is, when viewed in different lights, colors look in appearance subject to change. More important than this is the color of any two people feel the way, there are many natural differences. Together, these problems explain why you feel your hard copy proof with the same customers, but customers think that printed materials are not consistent with the proofs.
In many of our control can be measured factors, the effect on the screen printing is the most critical network increases. Network printing methods increased in all conventional phenomena will appear. No matter how carefully the implementation of printing, the ink transfer, the network created around the perimeter of the Federation of increasing phenomenon. In addition, the increased network capacity in the whole range of colors is not consistent. The network is among the largest transfer network (about 50% of the network size), these outlets increased most. The smaller the dot, dot the smaller increase.
Screen lines also affect the degree of increase. Screen lines the higher the value of any color the higher the percentage of dot gain. This is because when the number of outlets per square inch increases, the circumference part of the network also increased. Figure 1 Comparison of different screen lines through the next few square inches total perimeter of all outlets to express this idea. In this example, one line per inch lines under a single network perimeter is 6.35cm (2.5 inches). In the case of four lines per inch, per square inch of the network number rose to 16, the total perimeter (in the case of the same hue value) rose to 25.45cm (10.02 inches).
Figure 1 how the impact of additional cable networks increased the number of screen lines with increased number of outlets has increased, the total circumference of all the network also increased. Network means the network perimeter to increase the possibility of increased enhancement.
The unique circumstances of Screen Printing
Screen Printing will not only increase the occurrence of network, and network losses also occurred. This usually occurs in areas of high light and shadows, in these two parts, dot is so small to actually interfere with wire mesh network printing (and occasionally exposed in mesh access points which interfere with the imaging film version) .
Printing standards According to "Webster's New World Dictionary" zone, the standard is the measurement of quantity, quality, value is set when the comparison of the rules or basic. (1) as the established rules, patterns are used and followed; (2) is generally considered to be reliable or authoritative. As a standard, which is not written or drawn out, on the contrary, the basic idea is usually started as technical norms or standards, and then borrowed, and slowly being adopted as a standard by the end.
Standard is designed to use up rather than out. Supply manufacturers and screen printing industry usually what standards? The vast majority of other printing methods used in those standards. Supply manufacturers do not need to establish or set up a standard. More likely is that they recommend the establishment of standards or norms, and with adequate resources to apply standards in product distribution. Thus, if the specification is the end-user adoption, there may eventually become the industry standard.
Pantone Matching System Pantone Matching System is the screen printing industry standards to comply with one of the most commonly used. At first it was only a technical specification. It started as an independent criterion to be used by designers of color. Once the designers have to use it, they can easily share information, and discuss it. For example, they can for the given object of a particular red exchange of views. Over time, as more and more designers to its satisfaction, that they can share a wide range of free information received from Pantone and the color can be quite easy to regulate. Designers could fit in a particular red object printing industry guidance. After a period of time, become the standard specification. Today, Pantone its color matching system has been accepted by the world standards.
S W O P In 1975, and from the commercial printing industry committee composed of representatives of the publication of technical specifications web offset publications (ie, SWOP). SWOP's original purpose was to help produce the magazine printing industry with control plate and color proofing film. Was added to ink density and dot gain related to technical specifications. Then, all specifications used for the gravure industry. Recently, SWOP standard large format inkjet printing equipment has been used manufacturers, many manufacturers indicated that their machines are tested by SWOP qualified. SWOP standards and Pantone graphics graphics standards to evolve the same way: as a printing industry standard specifications, over a period of time will be accepted for other printing methods.
In the production of color separations for screen printing films, except for areas of high light and middle tone colors were the percentage of correct use of the SWOP standard-setting than the larger network increases the rate, otherwise difficult to obtain uniform effect. To make matters more complicated is that most of the images displayed on the computer directly from the factory set SWOP20% increase, therefore, observed at the design stage all the images of the network have increased by 20%. Most of the screen printing industry does not know this, so they do nothing to adjust. In theory, the screen printing industry should accept and apply more accurate color reproduction that screen printing capacity increased targets. Screen Printing industry many manufacturers are based on the final size of printed images to select screening lines. Lines can range from vending machines used for billboards or commodity panel 25 ~ 35lp
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