ISO 12635-2021 pdf free download – Graphic technology — Plates for offset printing — Dimensions.
This document specifies the width, length and thickness of metal lithographic printing plates (referredto hereafter as“plates”). For plates to be used in computer to plate (CtPJ applications,flatness,edge straightness and burr requirements are also included.These requirements are applicable tounprocessed plates.
2Normative references
There are no normative references in this document.
3Terms and definitions
For the purposes of this document, the following terms and definitions apply.
IlSO and lEC maintain terminological databases for use in standardization at the following addresses:-ISo online browsing platform: available at https://www.org/obp
一IEC Electropedia: available at https://www.electropedia.org/3.1
cutting burr
ridge along the edge of a plate produced by cutting, especially with a blunt knife3.2
plate widthw
dimension of a printing plate parallel to the cylinder axis (clamping edge)3.3
plate thicknesss
caliper of a coated plate3.4
edge waviness
degree to which a plate edge conforms to a measurement plane3.5
plate edge straightness
maximum deviation of the plate edge parallel to the cylinder axis (clamping edge) from a straight line,drawn from the corners of the plate
3.6
unprocessed plates
plates as received from the manufacturer
4 Requirements
4.1 Measurement conditions Measurements shall be conducted when both measurement equipment and plates have reached a stabilized temperature of 21 °C ± 1 °C.
4.2 Plate dimensions Commonly used plate widths and heights identified by plate and press manufacturers are specified in Annex D. When selecting plate width and height, these preferred plate sizes should be used. Where these plate sizes cannot be used, plates for sheet-fed lithographic use may be of any length, L, or width, W, but shall be specified in multiples of 5 mm where the last whole number digit is 0 or 5. Plates for web lithographic use may be of any length or width but shall have their width specified in multiples of 5 mm where the last whole number digit is 0 or 5 and their length specified in multiples of 2 mm where the last whole number digit is 0, 2, 4, 6 or 8. These requirements are summarized in Table 1. Except where preferred plate sizes are being used, the tolerances for length and width shall be as shown in Table 1, the measurement conditions of 4.1 shall apply. The preferred thicknesses and their tolerances shall be as shown in Table 2.ISO 12635 pdf download.