TECHNICAL INFO




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Ink profiles
The performance of Process Colour ranges are described according to 6 criteria graphically represented by the Ink Profile.
Each criterion is assigned a simple rating between 1 and 6:

Example : LOGO 18000 Process Colours
• 1 = average to low performance.
• 6 = excellent performance. By visualising the technical profile of a Process Colour range, the printer can predict the behaviour of the ink on the press as well as the qualitative results of the print, providing a suitable substrate has been chosen.
Definitions of ink performance criteria:
Duct freshness: Ability of the ink not to dry, either on the press or in open tins.
Setting: Ability of the printed ink not to remain sticky when touched (touch dry state). It provides an indication of the speed at which the ink penetrates into the substrate: if the setting is rapid (in other words, touch dry within one minute of printing), the risk of set-off is considerably reduced.
Colour strength: Ability of an ink to give maximum optical density with a minimum inking.
Gloss: Light intensity reflected by the dry ink film (very dependent on the surface condition of the substrate).
Rub resistance: Ability of the dry ink film to resist rubbing and abrasion.
Drying speed: Time required to obtain complete hardening of the ink film through air oxidation.
 We have analysed all of the different types of substrate used in offset prin- ting according to the criteria of absorption, surface condition and abrasiveness as defined hereafter. This analysis has enabled recommendation tables to be established for different ink series.
 
Non coated
**
Matt coated
**
Gloss coated
***
Lightweight paper
**
Cardboard
***
Non absorbent substrates (1)
*
Synthetic substrates (2)
*** Perfectly suitable ** Suitable * Test necessary Not suitable
Example : Recommendation for the LOGO 18000 Process Colours range as a function of the substrate type.
Definitions of substrate performance criteria:
Absorption: Ability of the substrate to absorb part of the components of the printed ink.
Surface condition: Characterises the surface relief of the substrate (flat or irregular). Abrasiveness: Ability of a substrate to deteriorate a dry ink film by rubbing.
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