Određivanje i karakterizacija zemljanih pigmenata u slikarstvu

master's thesis

• Title (english): Investigation and Characterization of Earth Pigments Used in Paintings
• Author: Matea Primožić
• Mentor: Domagoj Šatović (mentor)
• Mentor: Barbara Horvat Kavazović (komentor)
• Committee member: Ana Božičević (predsjednik povjerenstva)
• Committee member: Suzana Damiani (član povjerenstva)
• Committee member: Vladan Desnica (član povjerenstva)
• Granter: University of Zagreb; Academy of Fine Arts; (Department of Conservation and Restoration); Zagreb
• Defense date and country: 2024-09-17, Croatia
• Scientific / art field, discipline and subdiscipline: FIELD OF ART; Fine Arts

Abstract

Obojene zemlje korištene su kao pigmenti u slikarstvu još od prethistorijskog doba zbog svoje snažne obojenosti i iznimne stabilnosti te se mogu naći posvuda u umjetničkim djelima (kao sastav boje ili kao dio osnove) i u svakom periodu. Mogu se podijeliti na različite načine, od kojih bi jedna bila podjela na okere, siene, umbre i zelene zemlje, ali česte su i podjele prema kemijskom sastavu, međutim raznolikost u tim podjelama i nesuglasice potječu od nedovoljne istraženosti samih pigmenata. Njihov točan mineraloški sastav još uvijek je nepotpun, vjerojatno zbog složenosti samih minerala a i složenosti analiza. Točna identifikacija minerala kao sastava pigmenata dala bi uvid u područje nastanka pigmenta, jer je sastav povezan sa procesom i okruženjem prilikom nastanka samog minerala, a to bi pomoglo proučavanju samih slikarskih tehnika i materijala. U ovom radu zemljani pigmenti analizirani su koristeći infracrvenu spektroskopiju sa Fourierovom transformacijom (FTIR), fluorescenciju rendgenskih zraka (XRF) i FORS (reflektancijska spektroskopija pomoću optičkih vlakana), pri čemu FTIR analiza otkriva kemijski sastav pigmenata na temelju signala funkcijskih skupina molekula uzorka, dok XRF daje elementni sastav. Dobiveni rezultati karakterizacije pigmenata su korišteni za analizu pigmenata u realnim uzorcima uzetim sa slike "Ženski akt" Marijana Detonija, pri čemu su uzeti uzorci crvene, žute, smeđe i zelene boje.

Abstract (english)

Natural earths have been used as artistic pigments since prehistoric times due to their stability under a variety of weather conditions, and high colouring capacity, which is why they can be found everywhere in works of art (as a part of colour mixture or as a part of ground), and in any historical period. They can be categorized in many ways, one of them being division into ochres, siennas, umbers and green earths. Categories depending on chemical composition are also common, but differences between them are due to incomplete research probably due to the complex nature of microanalysis of clay materials. Analytical characterization of natural earths, i.e. exact identification of the mineral would give an insight into their natural genesis and provenance, which would help in studying historical painting techniques and materials. In this work, characterization of store-bought pigments has been carried out using Fourier transform infrared spectroscopy (FTIR), X-ray fluorescence spectroscopy (XRF), and fiber optic reflectance spectroscopy (FORS). FTIR analysis detects functional groups within molecules of the sample, while XRF analysis reveals elemental composition. Results were used to analyze spectra obtained from samples collected from the painting done by Marijan Detoni. Samples were taken from areas of red, yellow, green and brown colour.

• Keywords: konzerviranje i restauriranje; slikarstvo
• Language: croatian
• URN:NBN: urn:nbn:hr:215:008134
• Study programme: Title: Conservation and Restoration; specializations in: Painting, Sculpture; Course: Painting; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: magistar/magistra restauriranja i konzerviranja umjetnina (magistar/magistra restauriranja i konzerviranja umjetnina)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2024-10-17 12:12:25