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Resumo(s)
A lanterna mágica foi o primeiro dispositivo de projeção de imagens que, acompanhada por
sons sincronizados, foi considerada como o "pré-cinema", amplamente utilizada não só em
palestras científicas e educacionais, como também em espetáculos de entretenimento, dispo-
nível para todas as idades. Embora o aparecimento do cinema tenha diminuído o seu uso,
espetáculos de lanterna mágica ainda ocorrem nos dias de hoje utilizando diapositivos de vi-
dro históricos.
Devido ao pouco conhecimento sobre conservação destas pinturas a frio em vidro, os diapo-
sitivos de vidro pintados à mão estão a degradar-se e perder a sua informação vital. De forma
a preservar estes diapositivos históricos e manter a tradição dos espetáculos de lanterna má-
gica, a produção de réplicas e cópias tornou-se uma necessidade a colmatar. Ao combinar
informação recolhida de fontes históricas literárias e análises feitas em diapositivos de vidro
históricos, uma metodologia para replicar estes diapositivos pintados à mão iniciou-se, tes-
tando com diferentes ligantes (goma arábica, goma arábica com glicerina, resina mástique,
óleo de linhaça e poli(acetato de vinilo)) (PVAc) e colorantes mencionados na literatura histó-
rica e encontrados em diapositivos de vidro históricos. De acordo com os testes de projeção e
adesão realizados, a resina mástique demonstrou os resultados mais satisfatórios para se pro-
duzir réplicas de diapositivos para espetáculos de lanterna mágica.
A produção de uma réplica foi iniciada utilizando um vidro panorâmico incolor com contornos
impressos no qual foi aplicada a pintura manualmente, tendo-se escolhido a resina mástique
como ligante e utilizando três colorantes (azul da Prússia, laca carmesim e amarelo de goma-
guta). Porém, a utilização da laca carmesim não permitiu a produção de uma réplica fiel ao
diapositivo histórico, tendo afetado a qualidade artística ao projetar uma cor roxa em vez de
rosa e por ter uma tonalidade rosa bastante diferente, tendo resultado, em vez disso, na pro-
dução de uma cópia.
Este trabalho foi o primeiro a explorar a produção de réplicas e cópias de diapositivos de vidro
pintados à mão para várias funcionalidades, incluindo espetáculos de lanterna mágica e ativi-
dades de disseminação oferecidas pelas instituições museológicas, pretendendo contribuir
significativamente para a preservação destes objetos patrimoniais valiosos.
The magic lantern was an image projection device that, along with synchronised sounds, be- came a "pre-cinema" delight, extensively used not only for scientific and educational lectures, but also for entertainment displays, available to all ages. Even though the appearance of cin- ema has diminished its’ usage, these magic lanterns’ events can still happen nowadays, using historical glass slides. Due to the little knowledge in conservation for these cold paintings on glass, hand-painted glass slides are degrading and losing vital information. To preserve these historical glass slides while still maintaining the tradition of magic lantern’s shows, the production of replicas and copies became a necessity. By combining information from written sources and chemical anal- yses of historical glass slides, a methodology for replicating hand-painted glass slides was cre- ated by experimenting with six different binders (gum Arabic, gum Arabic with glycerine, mastic resin and poly(vinyl acetate) (PVAc) and colourants mentioned in the literature and found in historical glass slides. According to the projection and adhesion tests, mastic resin was the binder that showed the best results to produce replicas for magic lantern's shows. The production of the replica was made with a panoramic glass with printed outlines and hand painted, choosing mastic resin and three colourants (Prussian blue, crimson lake and gamboge) as paint materials. However, the usage of crimson lake did not allow the production of a faithful replica to its historical slide due to pigment's projection of a purple colour instead of a pink colour and, also, the difference of pink colour between the crimson lake and the original slide, having produced a copy instead. This work was the first to explore the production of replicas and copies of hand-painted glass slides for various purposes, including magic lantern shows and dissemination activities offered by institutions, with the purpose of contributing to the preservation of these valuable heritage objects.
The magic lantern was an image projection device that, along with synchronised sounds, be- came a "pre-cinema" delight, extensively used not only for scientific and educational lectures, but also for entertainment displays, available to all ages. Even though the appearance of cin- ema has diminished its’ usage, these magic lanterns’ events can still happen nowadays, using historical glass slides. Due to the little knowledge in conservation for these cold paintings on glass, hand-painted glass slides are degrading and losing vital information. To preserve these historical glass slides while still maintaining the tradition of magic lantern’s shows, the production of replicas and copies became a necessity. By combining information from written sources and chemical anal- yses of historical glass slides, a methodology for replicating hand-painted glass slides was cre- ated by experimenting with six different binders (gum Arabic, gum Arabic with glycerine, mastic resin and poly(vinyl acetate) (PVAc) and colourants mentioned in the literature and found in historical glass slides. According to the projection and adhesion tests, mastic resin was the binder that showed the best results to produce replicas for magic lantern's shows. The production of the replica was made with a panoramic glass with printed outlines and hand painted, choosing mastic resin and three colourants (Prussian blue, crimson lake and gamboge) as paint materials. However, the usage of crimson lake did not allow the production of a faithful replica to its historical slide due to pigment's projection of a purple colour instead of a pink colour and, also, the difference of pink colour between the crimson lake and the original slide, having produced a copy instead. This work was the first to explore the production of replicas and copies of hand-painted glass slides for various purposes, including magic lantern shows and dissemination activities offered by institutions, with the purpose of contributing to the preservation of these valuable heritage objects.
Descrição
Palavras-chave
Réplica Cópia Diapositivos de vidro pintados à mão espetáculos de Lanterna Mágica resina mástique
