Ultrasonic Misting. Part 1, Experiments on Appearance Change and Improvement in Bonding

Michalski, Stefan; Dignard, Carole

doi:10.2307/3179826

Cited by 5 publications

(2 citation statements)

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“…The pigment layers were then consolidated with the above described selected adhesives either four times without intermediate drying or only once by soaking the pigment layer; in both cases the distance between the nozzle of the aerosol generator and the paint layer was 1 cm. The latter application method is based on a study by Michalski and Dignard (1997) where the aerosol stream was held for a few seconds onto the sample until a liquid layer of consolidant was created and the pigment layer is fully saturated. All pigment layers were misted with ten different adhesives (Table 1).…”

Section: Sample Preparationmentioning

confidence: 99%

“…Vermillion and the mixture of ultramarine and lead white can be frequently found in medieval pigment palettes and are known for creating friable pigment layers. Green earth was included because it was reported to be susceptible to colour changes when consolidated using ultrasonic generators (Michalski and Dignard 1997). Chromium oxide green was chosen as a rather modern pigment from the mid-nineteenth century.…”

Section: Pigment Selectionmentioning

confidence: 99%

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

Pataki-Hundt

Hummert²

2016

Restaurator. International Journal for the Preservation of Library and Archival Material

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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* ab -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.

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Section: Sample Preparationmentioning

confidence: 99%

Section: Pigment Selectionmentioning

confidence: 99%