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The Art and Science of High-End Digital Color Print- Making at CIC 2019 Digital Photography for Art Conservation Clotilde Boust Head of imaging group, Center for research and restoration for French Museums -C2RMF [email protected]

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Page 1: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

 The Art and Science of High-End Digital Color Print-Making at CIC 2019

Digital Photography for Art Conservation Clotilde Boust Head of imaging group, Center for research and restoration for French Museums -C2RMF [email protected]

Page 2: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

2

C2RMF

C2RMF

•Ministry of Culture

•1200 French Museum

•Research and restoration of art works

•Since 1920

•4 departments : restoration, research, documentation, preventive conservation

Page 3: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Research departement

Find out materials and fabrication technics

Objets ImagingPainting Datation AGLAE

Page 4: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Imaging…

Non invasive technics Photography (UV-IR), Radiography, 3D

Page 5: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

• State of art • Material identification • Fabrications techniques

…for conservation-restoration

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UV/

fluo

IR

Page 6: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Photography device

Hasselblad (H4D-60 & H6D-100), IR filter removed, lenses IR corrected

Lighting flash, tube UV, halogene IR Filters to select nm range UV/VIS/IR

Page 7: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Photography - visible - raking light

-> register state of art of color and surface

Page 8: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Photography visible light

Page 9: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Color calibration with Phocus during acquisition Reproduction mode, working Hasselblad, export Adobe

Page 10: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Raking light

Anonyme XVIIIè s. – Panneau de paravent – peinture sur satin de soie – Archives nationales - C2RMF, E.Lambert

Page 11: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Photography UV induced fluorescence in visible range

-> organic material localisation (varnish, glue, wax…) -> pigment identification

Page 12: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Target UV from UV innovation

Spectralon for uniformisation from IR to UV

Register in visible (filter 2 E anti UV)

Fluorescence UV

Page 13: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Visible / UV induced fluorescence

Ecole de Tours XVe s, « Vierge en prière », musée des Beaux Arts de Tours

Page 14: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Varnish

Giampetrino «Le suicide de Cléopâtre» - Musée du Louvre - photographie en cours de restauration – C2RMF, E.Lambert

Page 15: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Pigment characteristic fluorescence

LD Fluorescence UV

SASSETTA – Polyptyque de Borgo San Sepolcro « Saint Jean l’Evangéliste » - Musée du Louvre – C2RMF, E.Lambert

Page 16: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle
Page 17: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Photography Visible induced fluorescence in IR domain

-> detect Han blue and Egyptian blue Light at 610 nm (LED), reemmission at 960 nm (IR)

Page 18: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle
Page 19: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Photography Reflexion in IR -> carbon under drawing -> pigment identification

Page 20: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Sensibilité du capteur InGaAs

Sensibilité du capteur CCD

+ filtre 87 (transmet le rayonnement supérieur à 800 nm)

Photographie infrarouge (IR)

Réflectographie infrarouge (RIR)

Page 21: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

IR traverse les couches de peinture Est absorbé par le carbone (rendu en noir)

Page 22: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Médium sec Médium fluide

RIR RIRImages Elsa Lambert C2RMF

Page 23: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Images false color - IRFC and UVFC

-> pigment identification help

Page 24: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

R

V

B

IR

Page 25: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

R

V

B

IR

Page 26: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Vincent Van Gogh, La Chambre à Arles. (1889) – Paris, Musée d’Orsay. Lumière directe. ©C2RMF-E.Lambert

Cartographie et Identification des pigments

Page 27: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Vincent Van Gogh, La Chambre à Arles (1889) – Paris Musée d’Orsay. IR fausses couleurs. ©C2RMF-E.Lambert

Cartographie et Identification des pigments

Page 28: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Chrome green

LD IRFC

Page 29: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Veronese green

LD IRFC

Page 30: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Image references catalogues Visible Induced fluorescence (from UV/VIS to VIS/IR) UV and IR false colors

+ reflections spectra, Lab colors

-> material identification help

Page 31: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Visible References IRFC

Page 32: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle
Page 33: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle
Page 34: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle
Page 35: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

35

Non contact spectrophotometer

Page 36: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

36

RUBY de STIL

■380 à 930 nm VIS-PIR ■Résolution 1 nm ■Rétrodiffusion ■Lampe halogène ■Spot réglable de 1mm, 3, 5, 8 mm ■Distance 7,5 cm

■angle réglable / main ■Angle sur pied 22° ■Logiciel STIL

Page 37: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Final data set

-> digital images with ICC profile (good accuracy but not perfect) -> printed images (Epson 4000) (average dE 5)

-> report given to chemist and conservators -> report and images registered on art work folder (digital and paper until recently)

Page 38: Digital Photography for Art Conservation...RUBY de STIL 380 à 930 nm VIS-PIR Résolution 1 nm Rétrodiffusion Lampe halogène Spot réglable de 1mm, 3, 5, 8 mm Distance 7,5 cm angle

Thanks for attention

http://c2rmf.fr https://copa.hypotheses.org (research blog imaging group)

Collaborations •Elsa Lambert Radiologue objets •Nicolas Mélard Conservateur •Anne Maigret Photographe objets •JL Bellec Photographe Radiologue •Laurence Clivet Photographe Radiologue •Charlotte Hochart Informaticienne 3D •Dominique Robcis Restaurateur métal •Elisabeth Ravaud Ingénieure peinture •Frédéric Blanc Restaurateur bois •Jérôme Rumolo Apprenti optique •…

http://c2rmf.fr
https://copa.hypotheses.org

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