Page 222 - Copper and Bronze in Art: Corrosion, Colorants, Getty Museum Conservation, By David Scott

59 60 A

P L A T E 5 8 Raphael (Raffaello Sanzio; Italian, 1483-1520) ,
The Holy Family (The Madonna del Velo; Madonna di
Loreto), mid-sixteenth century. Oil on panel, : 120.5 cm;
H
w: 91 cm. The green paint used for the drapery in the
background is copper resínate, an organometallic com­
pound commonly used during the Renaissance for a green
pigment and as a green glaze. Los Angeles, J. Paul Getty
Museum (71.ΡΒ.Ι6).
P L A T E 5 9 Cross section of copper resínate from The Holy
Family shown in P L A T E 58 . The pigment is the very dark,
opaque green layer in the photomicrograph (ultraviolet
illumination, magnification χ 270).

P L A T E 6 0 Photomicrographs of a sample of Scheele's
A
green from the Forbes pigment collection: , viewed
B
under plane polarized light; and , viewed under crossed
polars (both in melt-mount R I 1.662, magnification χ325).
60 B
P L A T E 6 1 Photomicrograph of copper diarsenite in plane
polarized light (melt-mount R I 1.662, magnification χ347).

6 1

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