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APR Liquid polymers   Photopolymers
APR liquid polymer plates are used in flexo printing and are suitable for virtually all applications in corrugated-board printing. Their special benefit is fast, economical processing, and since they are processed without the use of solvent, they are particularly compatible with the environment.
The APR system comprises two basically different types of polymer, which in turn are divided into different categories of Shore hardness: the softer base polymers compensate for any irregularities of the cylinders and the corrugated board to be printed; the hard capping polymers ensure sharp-contour image transfer combined with extremely low dot gain. APR plates are processed in equipment systems developed by Asahi Photoproducts.
  Base Polymers
Asahi has several photopolymer types available for the user to choose from, differing in their printing properties.
They differ particularly in the characteristic of Shore hardness, which is in each case ideally suited to the specific requirements of a wide variety of corrugated-board qualities.

Capping polymers
Here again, the choice is between several photopolymer types.
Each of the capping polymer types is suited in its properties to the particular base polymer type it is to be used with. They influence the results in printing on any quality of corrugated board.
Dot sharpness and dot shape, tonal value range and intermediate depths satisfy all demands on quality.
    Special APR techniques
    Capping technology
The capping process makes it possible to use, in one plate, two photopolymer types that differ in hardness.
The capping polymer with its high Shore hardness ensures optimum rendition of the image in print while the base polymer gives the APR plate maximum compressibility.
The capping polymer is the first to be laminated over the negative film, and followed by the base polymer. This operation is carried out with a slight difference in time.
You will find more information on the subject in our manual, which we will be pleased to send you on request.
    Rapid Register
APR plates produced with the Rapid Register System are of one piece, meaning that the printing elements are immediately in correct position on the base film which at the same time serves as mounting film. The finished plate merely needs to be fitted with the clamping bars and holes. A special Rapid Register mounting system is available for this purpose.
APR plates produced with the Rapid Register System are of one piece, meaning that the printing elements are immediately in correct position on the base film which at the same time serves as mounting film. The finished plate merely needs to be fitted with the clamping bars and holes. A special Rapid Register mounting system is available for this purpose.