Consolidation tests in archaeological wall painting: comparing treatments depending on the painting technique

Abstract

Consolidation is a treatment of great importance for archaeological wall paintings due to their state of preservation, in which the lack of cohesion of the mortar and the pulverulence of the pictorial layer are common. The objective of this work has been to evaluate consolidation tests that have been carried out on decontextualized fragments belonging to five different wall paintings (from different periods and with differences in their state of conservation and in their painting techniques). For this, two of the most used treatments in consolidation of archaeological coatings, such as an acrylic resin and ethyl silicate, have been compared with two treatments that use nanoparticles, such as nanolimes and nano ethyl silicate, together with a bioconsolidation treatment used until present mainly for the consolidation of stone material: bacterial carbonatogenesis.

Colorimetric evaluation of 3D printing polymers exposed to accelerated aging for Cultural Heritage applications

“…51 The CIELAB color-difference formula is useful and commonly employed in the cultural heritage research field. [52][53][54][55][56][57] However, in this case, CIEDE2000 colordifference formula was chosen as a standard following the latest recommendation made by CIE and ISO. 49,58,59 In fact, CIEDE2000 was initially recommended for a set of "reference conditions" (e.g., uniform samples with CIELAB color differences below 5.0 units) that are different from the current ones.…”

“…The CIELAB color‐difference formula is useful and commonly employed in the cultural heritage research field 52–57 . However, in this case, CIEDE2000 color‐difference formula was chosen as a standard following the latest recommendation made by CIE and ISO 49,58,59 .…”