BS ISO 2834‑1:2020 pdf download.Graphic technology — Laboratory preparation of test prints.
1 Scope
This document specifies a test procedure for the preparation of test prints on paper, board, metals, foils and other suitable substrates using paste inks, such as for offset and letterpress printing, using electrically driven IGT-type and prUfhau-type printability testers.
This document describes the procedure for reference optical density and reference ink film thickness.
This document describes the method as used on the current models of testers. Most of the described procedures are also applicable in analogy to the older models but can require additional steps to he executed or recalculation of the settings to make them conform to this document
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5-4, Photography and graphic technology — Density measurements — Part 4: Geometric conditions for reflection density
ISO 187. Paper, board and puips — Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples
ISO2a46-1, Graphic technology — Colour and transparency of printing inksetsforfour-colour printing — Part 1: Sheet-fed and heat-set web offset lithographic printing
ISO 5631 (all parts), Paper and board — Determination of colour by diffuse reflectance
1SO 13655, Graphic technology — Spectral measurement and coloriinetric computation for
graphic arts images
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
ISO Online browsing platform: available at https://www.isoorg/obp
— I EC Electropedia: available at http://www.electropedia.org/
3.9
rubber
elastomer
elastomeric materials covering printing forms (31), top rollers (3.12), packings (3.5) and substrate carriers (ili)
Note ito entry: In practice, some of the materials are nor rubber.
3.10
substrate
material to be printed on
3.11
substrate carrier
mounting plate for the sample to be printed
Note 1 to entry: With on top a specific material for mechanical protection or to simulate the hardness of the impression in printing practice or to accentuate the effect of the test on the printed image.
3.12
top roller
soft, elastomer covered roller
Note I to entry: Used in a three-roller inking system for ink distribution and as ink transfer roller to the printing form.
4.2 Printing form 4.2.1 IGT-type 4.2.1.1 Aluminium One or more aluminium printing forms, of specified width, with smooth edges, a diameter of (65,0 ± 0,2) mm and a temperature‑insulating handgrip. The weight of the disc shall be low enough to weigh it on an analytical balance with an accuracy of 0,1 mg. An aluminium printing forme shall always be used in combination with a packing.BS ISO 2834‑1 pdf download.