Graphic technology. Process control for the production of half-tone colour separations, proofs and production prints - Coldset offset lithography on newsprint

BS ISO 12647-3:2005 Graphic technology. Process control for the production of half-tone colour separations, proofs and production prints. Coldset offset lithography on newsprint

BS ISO 12647 specifies a number of process parameters and their values, for preparing colour separations. It can be used for four-colour printing or when producing four-colour prints by:

• Heat–set process

• Sheet-fed process

• Continuous forms of process printing

• Proofing for one of these processes

• Offset proofing for half tone gravure

This part of ISO 12647 is applicable:

To coldset offset proof and production printing and off-press proof printing processes on newsprint that use colour separation films rather than digital data;

By analogy to press printing from printing surfaces produced by direct imaging methods and the corresponding proof printing processes.

It is not applicable:

To line screens and non-periodic screens although certain parameters given can be applied by analogy. In particular, the tone value increases specified, apply directly because they refer to control patches that contain periodic screen half-tones.

To flexo and letterpress production printing although a number of parameters can be applied by analogy.

Content of BS ISO 12647-3:

Foreword

Introduction

1 Scope

2 Normative references

3 Terms and definitions

4 Requirements

4.1 General

4.2 Data file, colour separation films and printing formes

4.3 Proof or production print

4.4 Additional requirements for single-colour reproduction and printing

5 Test method: tone value and tone value increase of a print

Annex A (informative) Tolerances for the secondary colour solids

Annex B (informative) Densities of ink set colours

Annex C (informative) Characterization data for 26 % and 30 % tone value increase

Annex D (informative) Grey balance

Bibliography