Optical and Colour Stability of Graphic Paperboards and Prints
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| Title | Optical and Colour Stability of Graphic Paperboards and Prints |
| Authors | |
| Abstract | In the study we investigated the influence of surface treatment on permanence and stability of various graphic paperboard types - board for books, brochures, business cards, calendars, protection package - under the conditions of accelerated ageing with increased temperature and relative humidity in the absence of light according to ISO/5630/3, and as specified for material on paper/board of permanent value by EN/ISO 9706 (8). Paperboards were coated with various coating colours, and subsequently lab printed in offset technique. The effect of artificial ageing on surface properties as well as on image optical and colour stability was monitored.The changes observed in surface characteristics such as smoothness, roughness, air permeability, absorptivity before and after the accelerated ageing process revealed a strong influence of coating components (pigments, binders) and surface treatment type. Increase in roughness, alteration of board absorption behaviour and change in optical and colour parameters - decrease in brightness, increase in yellowness, colour shift with samples containing higher amount of optical brightening agents - were the most pronounced results.Measured differences in printing colour (dE) and optical density values indicated that colour stability of offset image approached the limit values, which are set for an image of still acceptable quality. Black (K) exhibited the highest stability among CMYK colours. Image colour stability significantly depends on surface and optical board characteristics, especially on gloss and optical brightener agent, as well as on board fibre composition and coating pigments. |
| Publisher | Acta Graphica |
| Date | 2003-04-09 |
| Source | Acta Graphica Vol 15, No 1 (2003) |
| Rights | The Author assign(s) to ACTA GRAPHICA d.o.o. copyright ownership in the Paper, effective if and when the Paper is accepted for publication by journal ACTA GRAPHICA and to the extent transferable under applicable national law. This assignment gives ACTA GRAPHICA d.o.o. the right to register copyright to the Paper in its name as claimant and to publish the Paper in any print or electronic medium.Authors, or their employers in the case of works made for hire, retain the following rights:All proprietary rights other than copyright, including patent rights.The right to make and distribute copies of the Paper for internal purposes.The right to use the material for lecture or classroom purposes.The right to prepare derivative publications based on the Paper, including books or book chapters, journal papers,and magazine articles, provided that publication of a derivative work occurs subsequent to the official date of publication by ACTA GRAPHICA.The right to post an author-prepared version or an official version (preferred version) of the published paper on an internal or external server controlled exclusively by the author/employer, provided that (a) such posting is noncommercial in nature and the paper is made available to users without charge; (b) a copyright notice and full citation appear with the paper, and (c) a link to ACTA GRAPHICA’s official online version of the abstract is provided using the link provided by Acta Graphica. |