Digital proofing technology question and answer
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(1) What is digital proofing technology?
The digital proofing system consists of a color inkjet printer or a color laser printer, a computer and a set of color correction system StarProof. The color gamut of a color printer is wider than the color gamut of a conventional print proof, and the color correction system can completely correct the color to the degree of the print sample. Digital proofing technology is a technique for simulating the color of printed proofs with a color printer.
(2) Why choose Epson series inkjet printer?
Epson series inkjet printers are fast, wide color gamut, stable ink color, excellent after-sales service and wide sales network. They are the ideal equipment for digital proofing.
(3) Why choose Apple's G4/450DP?
Digital proofing requires fast speed, stable system and strong anti-piracy performance. The G4/450DP is a dual-CPU Apple computer with fast speed and stable system. From the practical point of view, this computer is the first choice for digital proofing computers.
(4) What are the two important conditions that must be met for digital proofing?
a. digital proofing color four-color printing press must be easy to catch up.
b. Because it is the first digital proofing, the graphic of the film must be consistent with the digital proofing.
(5) Why is the cost of digital proofing lower than traditional proofing?
a. There are too many people in traditional proofing; those who use digital proofing can also proof.
b. The traditional proofing takes up too much space; the digital proofing is only 15 square meters.
c. Traditional proofing equipment is too much, too expensive, too much depreciation; digital proofing equipment is cheap.
d. Traditional proofing supplies are too much and not cheap; digital proofing supplies are only paper and ink.
(6) Why is digital proofing fast? Why is the color stable?
Digital proofing does not need imposition, printing, development, printing, wiping, overprinting, inking, washing, no need to worry about temperature and humidity, no need to bear the heart, ink, do not worry about the inaccuracy, color cast color and each There is a difference in color. Due to the manual inking, the traditional proofing is easy to cause uneven color, and the color of the proofing sheets is inconsistent. Digital proofing Because of the precise control of the color jet machine by the computer, as long as the color correction curve is selected, the proof color will be consistent at any time.
(7) What are the main advantages of the StarProof system compared to other digital proofing systems?
a. Color correction is easy, and color can be easily calibrated without a spectrophotometer.
b. Because the system is connected to the photo-arraying machine, the file data interpreted by the image-arrangement machine RIP is used for digital proofing. After the customer is satisfied, the file data of the RIP-interpreted file can be exposed, and only RIP can be issued once. The film is consistent with the proof. The linearization data that utilizes the RIP of the imagesetter is the reason why the color is easy to correct.
(8) What benefits does the release film give to customers after proofing?
a. can check whether the hair piece is wrong or not, reducing customer waste.
b. Advertising company can first show the accurate design effect to the customer before releasing the film, avoiding the phenomenon that the previous design draft has to be repeatedly sampled and wasted.
c. cost savings: film proofing Beijing recently a 16K four colors about 65 yuan, and Shangpin company's digital proofing price is 50 yuan, and customers see accurate color samples before the film, so that customers save A lot of cost.
d. saves time: In the past, the sample proofing customer had to run 2 times, and the time was long. Now a small number of digital proofing and filming can be taken, and the film can be seen first, and the error can be found in time to avoid losses and save time.
(9) What are the benefits of purchasing a StarProof digital proofing system for the output center?
In the past, after the output center issued the film, it was sent to the professional company for proofing. Often, due to the problem of proofing or the filming error, the customer did not give the checkout, which caused great losses and also sinned the customer. With digital proofing, you can proof first, and the customer will release the film after signing, to ensure that there is no mistake, that is, not to blame the customer and to ensure quality and time. After purchasing the digital proofing system, the proofing price has dropped, attracting a large number of customers and driving The amount of hair is rising. The price of the digital proofing system can be controlled within 15 to 200,000 yuan, and the output center can recover the investment cost within half a year.
(10) What are the characteristics of digital proof paper? Why use this paper for digital samples?
Digital proofing paper is a kind of imitation coated paper, which is very similar to coated paper and is a kind of digital proofing paper with good effect. In addition, Beijing Shangpin Plate Making Co., Ltd. is developing and producing a double-sided imitation coated paper. In the past, traditional proofing was generally proofed with coated paper, and coated paper printing was more common. Therefore, using digital imitation paper to make digital samples is very close to traditional printing samples.
(11) Digital proofing Why customers are welcome and the printing factory is skeptical?
Because digital proofing is cheap, fast, stable, and avoidable mistakes, it has been widely welcomed by customers. Since the printing house had previously received some customers who used the color spray to print, the printing house could not catch up with the uncorrected color spray. Digital proofing is a corrected color spray. The printer is afraid of not being able to catch up with the color responsibility, so it is suspicious and resistant to digital proofing, and some daring printers will find it easy to catch up with digital proofing. The business has soared.
(12) What is the situation of Taiwan digital proofing?
Since the StarProof system was first used in Taiwan, 80% of Taiwan's plate making factories now use digital proofing.
(13) Why do you want to use a large color block to color?
Because the color correction of small color blocks is easy to cause color interference, the color is not good, and comparing colors with large color blocks will be very accurate. To avoid color interference, use a piece of white paper to cut a small hole on the color block to compare colors.
(14) Why is it easy to calibrate colors using data from the RIP?
Because the photo-issuing machine has been linearized by RIP, that is to say, if the linear processing is not performed during the filming, the film will expand the dot, and the linearization is to use the computer's correction software to expand the dot to make the computer The set color data is accurately represented on the film. The data obtained by using the RIP of the photo-aligning machine means that the linearized data of the photo-aligning machine is used, so that the color of the color-spraying machine is relatively close to the printing sample, and then some fine-tuning can be consistent with the printing sample.
(15) Why should I first color the C, M, Y, K 100%?
C, M, Y, and K are basic colors. Since the color of the inkjet ink is different from the printing ink, the 100% color patches of the four basic colors must be calibrated before other color patches can be calibrated.
(16) Why is the CM, CY, CMY and other superimposed color blocks not allowed after the C, M, Y, and K colors are calibrated?
Inkjet printing two-color, three-color, four-color overlay is ink dot overlay; printing two-color, three-color, four-color overlay is dot overlay. Even after the four colors of C, M, Y, and K are calibrated, there are differences between the superimposed color digital samples such as CM, CY, and CMY and the printed samples. Two different color printing blocks and color inkjet color patches will give different measurement data by spectrophotometer. The main reason is that the superposition method is different. Therefore, it is very consistent to use the spectrophotometer to correct the color spray sample and the printing sample. difficult.
(17) Whether traditional proofing and offset printing will cause outlets to expand?
When the film is released, the dot of the film can be enlarged and controlled very well by the computer, but the dot enlargement when printing and offset printing is difficult to control, and the dot enlargement is related to printing ink, paper, temperature, humidity, and pressure of the printing machine.
(18) digit digital proofing result in dot gain?
Digital proofing is produced by inkjet, and the general dot gain is small.
(19) What are the three steps in the 19StarProof color correction system?
The first step is to color the color of the C, M, Y, and K100%.
The second step is to CM, CY, CK, CMY, ... CMYK superimpose the color of the color block at 100%.
The third step is to set the color of the 15 groups of color blocks from 10% to 90%.
If the correction of 150 color blocks is correct, the life of any customer will be basically the same as the printed sample. Unlike some school color software, a picture is calibrated, but other colors are not accurate.
(20) What are the functions of the 20StarProof color correction system?
a. It has the function of calibrating the color of C, M, Y and K100%.
b. It has the function of adjusting the color of 100% of CM, CY, CK, CMY, ... CMYK superposition to be consistent with the printing color block.
c. There are adjustment outlets to expand the function of analog printing outlets.
(21) Why is the StarProof digital proofing system only RIP once?
Other digital proofing systems are composed of non-horsing machine RIP plus color management system. After the digital proofing, the PS file is sent to the RIP of the imagesetter to explain the hair piece. Due to the interpretation twice, the two interpretations are unlikely to be 100% guaranteed, resulting in inconsistency between the film and the proof. As long as it happens once, it will cause great losses to customers. The StarProof system uses digital proofing using data from the imagesetter RIP, so there is no inconsistency between the graphics and digital proofs. RIP is the biggest feature of the system at a time, and it is also better than other digital proofing systems.
(22) Is the digital proofing generated by the StarProof digital proofing system exactly the same as the image of the film? Is there a quality inspection department?
a. The digital proof is exactly the same as the image of the film.
b. If the film is not allowed to be overprinted, there are scratches, the quality of the film produced by the photo machine and the developing machine, and the digital proof cannot be checked out.
c. Be sure to set up the quality inspection department to check whether the film is overprinted, check whether the film is scratched, dirty, the density of the film and the qualification of the dot.
(23) Which StarProof digital proofing system can be networked with?
a.Harlequin Script works RIP
b.Agfa Taipan RIP
c.Dainippon Screen Pixel Stream Imposition Workflow
d. Any 1-bit TIFF compression format generated by the following system
·CCITTG4·CCITTG3·CCITTHuffmanRLE·Packbits·In the near future, StarProof will support any TIFF compression format.
(24) What is the workflow for using the StarProof digital proofing system?
As with the hair piece, first make the file into a PS file, interpret the PS file on the imagesetter computer, set the TIFF format after the interpretation, generate a TIFF file, transfer it to the Mac machine where the StarProof software is located, and set the file to be printed on the Mac. Curve, print to produce digital proofs. After the digital proofing is approved by the customer, the TIFF file in the existing computer is pulled into the photo-printing machine print queue, and the selected film setting can be used to expose the film to ensure that the film image and the digital proof image are completely consistent.
(25) What printing devices can the StarProof digital proofing system connect to?
Epson series color inkjet printer, color laser printer.
HP series color inkjet printers, color laser printers.
(26) What kind of expertise is needed for digital proofing? Why is the color of the company still accurate?
a. Long-term printing platemaking experience and theoretical basic knowledge.
b. In-depth understanding of color theory.
c. A deep understanding of the software features.
d. Shangpin Company has been engaged in printing and platemaking for a long time. It has a strong research and development group with profound theoretical foundation and experimental ability. Shangpin has a full range of color printing plate making equipment, with the economic basis and equipment capabilities of repeated experiments.