In the field of printing, the English abbreviation "CTP" has different meanings in different occasions.
1. Computer to Plate: From the computer directly to the printing plate, which is often referred to as "offline direct plate making".
It was first developed from direct photoengraving. All plate making equipment is computer-controlled laser scanning imaging, and then through printing, fixing and other processes into a printing plate. Nowadays, the special computer direct plate making technology, that is, the computer-controlled plate-making machine completes the plate making process and omits the process of film-out, which is the most important link in the modern digital printing process.
2. Computer to Press: From the computer directly to the printing press, that is, people often say "in-machine plate making".
It installs the plate on the drum of the digital press, and then outputs the graphic information directly to the plate through a computer-controlled laser beam, and then starts printing. At present, such plates can record pictures, but they cannot be erased and can only be used once.
3. Computer to Paper / Print: From the computer directly to the paper or print.
Computer to Paper is equivalent to inkjet printing, that is, the inkjet head is controlled by a computer, and very small ink droplets are directly printed on the paper to form graphic information.
Computer to Print is equivalent to a computer-controlled laser beam that directly outputs graphic and text information to a "print plate".
4. Computer to Proof: Get proofs directly from the computer, ie digital proofing.
Digital proofing is an important part of the prepress field in the process of data control. Its purpose is to verify the quality of the print and the customer's confirmation of the printing effect. Due to the low price and high efficiency, digital proofing is gradually replacing some of the traditional analog proofing.
With the development of CTP technology, CTcP technology (Computer To conventional Plate) has emerged, which is a common PS plate direct plate making technology, which is a powerful challenge to the traditional CTP technology.
In general, CTP technology refers more to computer to Plate technology.
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