At present, there are many ways of outputting graphics and text. Common ones include Computer to Proof (Digital Proofing), Computer to Film (Computer Output Film), Computer to Plate (Computer Off-line Direct Plate Making), Computer to Press (Computer-to-Machine Direct Plate Making), Computer to Paper / print (digital printing), etc.
The usual proofing is that after the printed page is made, the proofing is divided into digital proofing and analog proofing. Simulated proofing is also called mechanical proofing. Its essence is simulated printing, which is to install the printing plate on the proofing machine under the condition of imitating the printing conditions (such as paper, ink, printing method, etc.), and obtain the proofs. The work flow is generally as follows: graphic output technology (get the original version) → drying the printing plate → simulation proofing → signing → printing plate production.
The purpose of proofing is the following aspects: â‘ The inspection sample of pre-press work is mainly to check the quality of the original version. For example, whether the original tone and color reproducibility meet the requirements; whether the layout size, image, text layout, rule lines, etc. are correct, and whether there are any omissions, etc. If there are any inadequacies, they must be corrected. â‘¡The printed reference samples mainly provide proofs or basic parameters for formal printing, such as ink color, dot reproduction range, etc., so that printing can be standardized and standardized. â‘¢As the customer's signature sample, the printed sheet is mainly provided to the customer. If the customer approves, the printed sheet will be signed and printed, otherwise, the printing company will have to revise it.
Simulation proofing is gradually withdrawing from the stage of history due to its complicated process, high cost, long production cycle and greater influence of human factors. More and more printing companies use digital proofing technology. The so-called digital proofing is to output the data of the page (or printed sheet) produced by the color desktop system without any form of simulation, directly through the color printer (inkjet, laser or other methods) to check the image page of the pre-press process Quality, provide reference samples for the printing process, and provide the basis for users to sign and print.
The usual digital proofing system mainly includes two parts: color management system and output device. There are many types of output devices used in digital proofing systems, including thermal transfer output devices, sublimation output devices, inkjet output devices, and laser output devices. There are two core technologies in the color management system, PostScript interpretation technology and color management technology. The PostScript interpreter ensures that the user's files can be correctly interpreted. The color management technology can ensure that the color of the proof output and the print output are consistent. There are many common color management softwares at present, such as: Bestcolor Digital of German Best Company (which has been acquired by EFI) Proofing software, BlackMagic digital proofing software from Australia, Star proof digital proofing software from Malaysia, and digital proofing software from German GMG company.
The pre-press process flow of enterprises using digital printing is as follows:
The digitization process of the manuscript → graphic processing technology → digital proofing technology → signing → graphic output technology (output film or output plate directly)
How should I buy my own digital proofing system? Generally speaking, when investigating the digital proofing system, two main aspects are considered: first, the technical specifications of the digital proofing system in terms of color reproduction and print quality; second, the effect of matching printing and its adaptability to print production. As for the products listed above, different software has its own characteristics. For example, the Best Color digital proofing system is currently the most widely used digital proofing system in China. It can make the general inkjet printer also have better output quality. Performance of your digital proofs. However, due to the defects of the ICC technology, if the output parameters are set incorrectly during the proofing output, it will not be possible to output, and there is also insufficient reproduction in the gray balance. The BlackMagic digital proofing software of Australia only controls the spot color spot when processing spot colors. The effect of the selective color correction function is not ideal, and the control of the gradation curve is not very accurate. Malaysia's Star proof digital proofing software corrects the color by adjusting the density. The color difference between the color adjusted by the Star Proof software and the printed color is about 1.8. The processing function of the 1-BIT TIFF file is powerful, and it can output an image with a precision of 200 lpi, but it has higher requirements for the operator and requires a good understanding of the color. The digital proofing products of the German GMG company are very outstanding in single black, spot color and true dot proofing. Therefore, when users buy digital proofing products, it is best to make comprehensive considerations based on the specific needs of the enterprise and referring to the characteristics of each software.
When purchasing a digital proofing system, in addition to digital proofing software, you must also select a digital output device. Color laser printing and thermal transfer / sublimation printing in digital output devices have not been widely adopted due to the high cost of equipment and printing. The accuracy of color laser print output cannot reach the accuracy of printed matter, so currently it is rarely used in the field of digital proofing; and color inkjet printing is the main product used for digital proofing. There are also two types of current inkjet printing. Foam inkjet printing technology and micro piezoelectric technology. Thermal foaming inkjet printers instantaneously heat the thermistor to expand the ink droplets in the firing boring to burst, so that the ink is emitted. Because the chemical composition of the ink changes at high temperatures, the resulting color stability is relatively poor. In addition, this type of printer head is a wearing part, so the print quality has a process of changing from good to bad. It is very difficult for the equipment using this technology to maintain the stability of color. Micropiezo technology inkjet printing uses changes in voltage to eject ink from the nozzle. Its nozzle is a solid piece, which fundamentally ensures color stability and consistency, and can meet the requirements of digital proofing for output devices. , While also greatly reducing the cost of output. Micro-piezoelectric technology is a patented product of Epson Corporation. The use of intelligent ink droplet conversion technology can make the output of the smallest ink droplets reach 4ppl, so as to meet the requirements of the fine dots of the printed matter, and the images and text are clearer.
Twin Size Egg Crate Mattress Pad
Egg Foam Mattress Topper,Egg Crate Foam Mattress,Egg Crate Topper,Egg Crate Bed Topper
Shenzhen Comfity Technology Co.,Ltd , https://www.comfitymemoryfoam.com