One: Proofing before RIP is the process of exponential code proofing directly interpreting electronic documents (usually ps files), and under the control of color management, the process of getting printed samples on the printer consistent with the printed matter. The process of pre-RIP proofing is FM dot printing, images, graphics and text information can be accurately reflected, but can not completely accurately reflect the final output RIP results and the structure of the printed dots. Its advantages are: fast speed, relatively mature application technology, and low requirements for software and hardware. It is mainly used in design proofing, pre-press process proofing and some contract proofing, and it is a digital proofing process that is currently widely used. Due to the multiple RIP output or the same RIP multiple output method, this process requires good compatibility between the digital proofing RIP and the final output RIP, and high technical requirements for the operator.

Two: Proofing after RIP is generally exponential code proofing RIP to output the 1-BitTiff file (that is, the Tiff file after the net is connected) generated after the final output of RIP. Under the control of color management, the printer is printed with the print quality Sample process. The 1-BifTiff file used for proofing after RIP contains all the information of the output layout, including all the information of text, layout, images, graphics and printed dot structure (dot line number, dot shape and angle), so the digital proof sample output accordingly It is the most faithful to the final printing effect. However, due to the huge amount of data in the 1BitTiff file, the software and hardware requirements are very high in the actual production and application process.

Three: The following picture shows the digital proofing process flow divided into RIP pre-proofing and RIP post-proofing:

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