Colour Stability of Natural Adhesives – Light Ageing of Adhesive Films and Colour Changes of Pigment Layers after Aerosol Application

Two aspects of consolidation of powdery paint layers are discussed in this paper: First, the colour stability of different consolidation media including cellulose and protein based materials was evaluated. Film sheet samples of the adhesives were exposed to a Xenontester for 276 hours to reach Blue...

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Bibliographic Details
Published inRestaurator Vol. 37; no. 2; pp. 137 - 156
Main Authors Pataki-Hundt, Andrea, Hummert, Eva
Format Journal Article
LanguageEnglish
Published De Gruyter 01.06.2016
Subjects
adhesives
aerosol
colour measurement
consolidation
light ageing
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Summary:Two aspects of consolidation of powdery paint layers are discussed in this paper: First, the colour stability of different consolidation media including cellulose and protein based materials was evaluated. Film sheet samples of the adhesives were exposed to a Xenontester for 276 hours to reach Blue Wool Standard 7. Light exposure caused loss of colour rather than yellowing in most adhesives which correlates to microfading tests. Secondly, colour changes of the pigment layer during application of consolidation media with an aerosol generator were examined. Any shift of colour results in a change of surface structure rather than a detectable shift seen in the ΔE* - values and the reflectance graphs. Thus, the application of aerosols is a very controllable, long-term stable method and results only in minor changes when applied in multiple layers.
ISSN:0034-5806
1865-8431
DOI:10.1515/res-2015-0020