ISO 22934 pdf free download
ISO 22934-2021 pdf free download.Graphic technology – Communication of offset ink properties.
This document specifies offset ink related properties which are intended to be communicated between ink supplier and the printer, and which are essential for the optimized print production planning and the intended use of the final product.
NOTE The final product is not necessarily the finished print product.
Aspects related to food safety and other safety requirements like children’s toys safety are not part of
the scope of 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 2836. Graphic technology — Prints and printing inks — Assessment of resistance of prints to various agents
ISO 12040, Graphic technology — Prints and printing inks — Assessment of light fastness using filtered xenon arc light
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.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1 corona treatment
application of an electric discharge on a low surface tension surface in order to increase the surface tension to improve ink wetting and ink adhesion
3.2 ink
composite material containing colourants, functional components, vehicle and additives
Note 1 to entry: The ink is applied as a fluid to a substrate in the offset printing process and setting or drying by either physical (evaporation) and/or chemical (polymerisations e.g. oxidation, radiation induced, or other) processes to form an image for decorative, informative or technical purposes.
3.3 light fastness
resistance of the print to the effects of a specified light source (such as filtered xenon arc light)
5.5 Drying mechanism
The drying mechanism shall be given in one of the main categories “oxidative”, “setting”, “radiation curing”, or “other”, More than one main category may be given if appropriate, e.g. “oxidative + setting”. For “radiation curing”, the use for one of the subcategories “mercury medium pressure lamps”, “iron doted mercury medium pressure lamps”, “Ii V-LED’, or “electron beam” shall be specified. For “other” drying processes, specific requirements shall be given in detail.
NOTE Radiation doses for energy curing inks are typically not given since the exact amount of the ink film thickness is not available during the print and different dosimeters requiring different calibrations are used in the market.
5.6 Resistance to solvents and alkali
Particular solvents or alkaline environment affects some pigments in inks. To avoid bleeding or colour changes of inks in contact with wet varnish or glue it was recognized that fastness to the following agents is very beneficial.
5.6.1 Ethanol
The resistance to ethanol shall be given for sheet fed offset inks and should be given for heat-set offset inks in one of the categories “fast”. “unstable” and “conditional”. Fastness to ethanol shall be tested according to ISO 2836.
5.6.2 Solvent mixture
The resistance to the solvent mixture consisting from denatured ethanol — ethyl acetate — 1-methoxy- propanol-2 mixture, 60 % by volume; 30 % by volume; 10 % by volume shall be given for sheet fed offset inks and should be given for heat-set offset inks in one of the categories “fast”, “unstable” and “conditional”. Fastness to the solvent mixture shall be tested according to ISO 2836.
5,6.3 Alkali
The resistance to alkali shall be given for sheet fed offset inks and should be given for heat-set offset inks in one of the categories “fast” and “unstable”. Fastness to alkali shall be tested according to ISO 2836. lithe ink film needs to be durable to even more rigorous conditions, testing according to ISO 12632lJ should be performed.
5.7 Fresh conditioning
For oxidative drying sheet fed offset inks the presence of skin-avoiding properties shall be given.
5.8 Additional information
Parties may agree on further Information, such as special resistances, ink film properties (gloss, slippage, etc.).ISO 22934 pdf download.
