The colour of ceramics from Bell Beaker contexts in NW Spain: relation to elemental composition and mineralogy

Raw material choices and material characterization of the 3rd and 2nd millennium BC pottery from the Petit‐Chasseur necropolis: Insights into the megalith‐erecting society of the Upper Rhône Valley, Switzerland

“…The heterogenous matrix and striated b ‐fabric may be natural artifacts of raw clays or represent the result of intentional blending/mixing of different raw materials (e.g., Eramo, 2020; Quinn, 2013; Whitbread, 2011), for example, an illite‐based clay and a granitic grus. Fe‐rich particles, which are particularly abundant in fabric 3 (Section 5.2), have been reported in BB culture ceramic ware from across the continent (e.g., Salanova et al, 2016, and references therein; Lantes‐Suárez et al, 2015). The presence of granitic rocks in ceramic pastes may be indicative of clays procured from weathering profiles and soils developed over decomposed granite (Niu et al, 2018; C. M. Rice, 1973), which is the well‐documented practice in other BB production centers (e.g., Convertini & Querré, 1998; Jorge, 2009).…”

“…Despite bimodal grain size distribution, the compositional correspondence between aplastic inclusions and groundmass made of Al‐rich stilpnomelane (Section 5.3; Figure 7 and Table 5) suggests little or no manipulation of the original raw material (Eramo, 2020). The BB pottery producers were indeed interested in Fe content of the raw material (Sections 5.1.5 and 5.2; Figure 9, Tables 3 and 5), which is capable of generating the red color of the ceramics (Supporting Information Material and ), a common feature of BB wares (e.g., Salanova et al, 2016, and references therein; Lantes‐Suárez et al, 2015).…”

Use of Thermally Assisted Hydrolysis and Methylation (THM-GC-MS) to Unravel Influence of Pottery Production and Post-Depositional Processes on the Molecular Composition of Organic Matter in Sherds from a Complex Coastal Settlement

“…Quantitative color analysis in the CIE L*a*b*C*h (CIELAB) color space was done using a Konica Minolta CR-5 colorimeter [34]. Samples were analyzed in the powder form.…”

Enhancing the mechanical features of clay surfaces by the absorption of nano-SiO2 particles in aqueous media. Case of study on Bronze Age clay objects

“…The materials' colours are provided in a uniform colour scale, being the most used the CIELab scale because it is the most uniform colour space from a perceptual point of view [30]. In this work, the influence of the consolidated treatments on the surface colour was evaluated by scanning the samples under a unique capture, making sure that all samples receive the same lamp intensity, while light exposure and capture parameters remained the same.…”