143 The painting “Purgatory” of the Mary retable Acrylic emulsion paint (PRIMAcryl by Schmincke) was used as a first retouching layer. After the varnish application, the finer nuances and details were carried out with Gamblin colours. Dammar resin with 2% Tinuvin 292 as a stabiliser varnish was applied step-by-step, with three separate layers added over time.99 For additional gloss-levelling of few matte areas, Laropal A81 (20% solution in a mixture of White Spirit : xylene in the ratio 1:1) was applied locally with fine retouching brushes. Fig. 218: Same detail after filling Fig. 219: Same detail after reconstruction and varnish application Fig. 220: “Purgatory” painting after conservation and restauration
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