ISO 22934-2021 pdf download.Graphic technology – Communication of offset ink properties.
5.5 DryIng mechanism
The drying mechanism shall be given in one of the main categories oxidailve’, setsing”, radiation curing. or oher”. More than one main category may he given irappropnate. e.g. “oxidatwe • setting”. For “radiation curing”. the use for one of the subategorws mercury medium pressure lamps. “iron doted mercury medium pressure lamps”. UV-LED” or “electron beam” shall be specified. For “other drying processes, specilk requirements shall be gwen in detail,
NOTE Radiation doses for energy curing inks are typically net gores since the exact amount of the ink film thickness is not available during the print and different dosi meters requiring dtflerent calibrations are used in the inarkeL
5.6 Resistance to solvents and alkali
Particular solwnts 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 benefkl.al.
5.6.1 Ethanol
The resistance to ethanol shall be given for sheet led offset inks and should be given for heat-set offset Inks in one of the categories fasr. “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” unstabie” 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 shouki 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, esting according to ISO 12632Iil should be pert os-med.
5.7 Fresh conditioning
For oxidativr 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, .tc).ISO 22934 pdf download.