Colour Specification of Terracotta Calatina Specimens

Analisi Quantitativa su miscele di pigmenti tramite XRF

Caratterizzazione di pigmenti storici singoli e in miscela

Characterization of component pigments in a mixture

This work is part of Raman spectra database constitution of pigments and materials of Cultural Heritage interest for polychrome artworks characterization. The colours of paintings are often obtained mixing pigments of palette artist’s. The attribution of a work of art to an author and the individuation of fakes are related to the identification of used pigments and also to the detection of mixture constituents. The main research objective is the extension of PH3DRA laboratory database with information useful to detect not only each single pigment but also quantitative data regarding its relative ratio in the examined mixture. The availability of spectra as revealed represents the primary li…

Dal colore alla caratterizzazione ottica di pigmenti antichi: validità del metodo spettrofotometrico e Teoria di Itten

Applicazione Integrata di Tecniche Analitiche per la Caratterizzazione di Pigmenti Storici

La Colorimetria nei programmi di Conservazione e Restauro: il ruolo della Spettroradiometria

Ruolo della granulometria sul colore dei pigmenti

Historical Building Dating: The Multidisciplinary Study of the Convento de São Francisco (Coimbra, Portugal)

Historical mortar: luminescence from fine grain quartz

Within the framework of a research programme aimed at the chronological reconstruction of the structures belonging to the architectonic complex of San Francesco alla Collina of Paternò (Catania, Italy), a procedure was carried out using thermoluminescence (TL) and optically stimulated luminescence (OSL) dating, respectively on terracotta bricks and mortar from the same sampling points. The primary methodological aim was to extend the application of luminescence dating techniques to mortar from historical buildings. Because the TL dating method dates the last firing of bricks, it offers a terminus post quem: the results give the period in which they were manufactured. The possibility that th…

Interconfronto di datazione TL ed OSL su terracotta

Nell'ambito di uno specifico programma di datazione tramite luminescenza stimolata termicamente (TL) e otticamente (OSL) campioni di terracotta sono stati preparati e misurati con diverse tecniche allo scopo di minimizzare l'errore sull'età ottenuta. I valori di dose equivalente sono stati ottenuti, su aliquote preparate utilizzando il protocollo standard fine grain (4-11 micron), con la tecnica della doppia Single Aliquot Regeneration AR (d-SAR) nel caso dei segnali OSL. I risultati ottenuti verranno confrontati con le età OSL ottenute di quarzo di granulometria maggiore (90-150 micron).

Historical building dating: refinement of established sample preparation protocol

Abstract: The application of thermal (TL) and optical (OSL) stimulated luminescence on pottery and building materials has allowed to resolve numer-ous problems in both the fields of retrospective do-simetry and dating. Routine measurements request the registration of TL signals obtained on polymineral fine-grained frac-tion (FG) extracted from pottery sherds and bricks used as building material with the Added Dose (AD) technique. One of the reasons of the dispersion of the lumi-nescence measurements when using this fraction is the variability of relative contents of quartz and feld-spars, which due to their differing behaviour influ-encing the equivalent dose (ED) and therefore its uncertai…