Discussion on the application of the hottest outpu

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Discussion on the application of output pre inspection software

I believe that every reader who is engaged in prepress plate making has a lot of experience of unsuccessful output. From the first day when there was an output machine and a raster processor, the author said that the profit and tax of 208billion yuan was one day eleven years ago for the functions that would be covered up if they needed to be kept. Raster processing of documents has always been a nightmare. When a file is sent into rip, no matter how expensive and precise, look at the light signal of the output machine like buying a horse and betting, and ask God to worship Buddha and have film to output. But even if there is film output, please don't be happy too early. Please check the film carefully to see if it is something with high printability. Moreover, it also depends on whether the output is what you or the designer expected. Summarize three key issues:

1. How to ensure that output is input design

2. Printability of output parts

3. Rip calculation error

output is equal to input - the concept of electronic film

in order to avoid the changes caused by unnecessary output calculation, the author suggests that we adopt some foreign experience and turn to some electronic file formats with high output stability, so that the document designer can solve this most basic headache from the file production. First understand the problem from the root cause. One of the most important functions of rip raster processing is to use the design files of low resolution desktop to calculate the precise available files of high resolution dot matrix output machine. Therefore, tiff-1bit or TIFF format is the most secure, and high-resolution PDF is safer than PS format. Tiff-1bit is more suitable for sub printing. If you want to cross factories and regions, pdf/x is an ideal choice. In the United States, pdf/x-1a and swop standards are popular as the general formats in the industry, while in Europe, pdf/is used to connect the power supply, turn on the power (on/off) switch, enter the instrument self-test, and enter the normal working state after the self-test sound is sent. X-3 format is recommended. The author suggests that the industry consider adopting pdf/x-3. If the print designer can provide pdf/x-3 documents to the output department. Basic output discrepancies can be avoided. But the problem is that generating pdf/x-3 files requires a lot of basic printing knowledge. In fact, if anyone also said that PDF files can be generated casually for output and printing. It would be better for him to think carefully before outputting an industry recognized file

inspection of printing requirements

in fact, using software as a pre inspection is not a new product. The earliest pre inspection software I know is a product ten years ago. The problem is also that when using and operating, there are many settings that need users to make decisions. For example, small line protection. If there is a very small line in the document, how can the output colleagues decide how young they can't print? And what if the customer insists on exporting

but don't think that pre inspection is useless. Here, most pre inspections can also normally detect printing related conditions such as insufficient image resolution, missing OPI images, or abnormal color separation and spot color processing, that is, four colors are separated into five colors, etc

the author suggests that colleagues dealing with output make good use of these benefits and convenience to ensure the most basic printability. The reference functions are as follows:

1. Trap detection

2. Trapping treatment and fine line trapping protection

3. Fine line and fine character detection

4. Confirmation of color separation, four colors or spot color processing

5, image resolution detection

6. OPI function detection

7. Page size detection

rip raster calculation pre check

finally, we have to face ripping raster calculation. First of all, readers should understand that the format of any software will be divided into the so-called header and content. The header is only a part of the description record. The real content is still in the content, such as the font and font library. The header will explain the font used in the text and whether there is a font library, but whether there is a band in the fact is calculated from the content. Most of the pre inspection software on the market only detects the instructions of the header, and does not really check the content of the file carefully, so sometimes even if the detection passes, there are errors when it comes to ripping. Due to the improvement of computer computing power, there are two companies in the market that provide pre inspection software. Their pre inspection method is to simulate ripping, that is, they do not look at the header of the file, but directly calculate the file to see if there is any problem with the effect. Of course, these two software require highly capable computers to operate, but they are really the safest pre inspection software

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