Page 525 - Copper and Bronze in Art: Corrosion, Colorants, Getty Museum Conservation, By David Scott

R resistance of polarization San Zeno church (Italy), portal
radiographic examination, 3 9 2 - 9 4 measurements for, 395 of, 395
rain Ricitte per Far Ogni Sorte di Colorí sang de boeuf 'glazes, 94
acid, and burial environment, 41 manuscript, verdigris in, sang de pigeon glazes, 94
and patina composition, 55, 56 f 286-88, 414-15, 4451 sanggam celadon ware, 91
pH of, and corrosion products, R M V . See relative molar volumes sasyaka, 146
149-52 roch alum, 287 Saturn Devouring a Child
Rapid (ship), 195 p Rochelle salt, alkaline, 355, 366, (Hurtrelle), shellac on, 330
cassiterite on, 71 372-73, 397n20 scab testing, 390, 397 n40
copper sulfides on, 196 p, 228 Rocks at Belle Isle (Monet), emerald Scheele's green, 307-10
leaded brass nail from, 196 p, 229 green in, 312, 4531 color-reflectance data for,
paratacamite on, 71 Roma or Virtus, statuette of, 310, 313 f
tenorite patina on, 95 212 p, 334 vs. emerald green, 312
working conditions for exami- hexagonal network structure properties of, 205 p, 208p,
nation Of, 195p, 228-29 Of, 213 p, 334, 336 309, 312
reaction soldering, of gold patina on, 213 p, 334, 336 recipes for, 3 0 8 - 3 0 9
chrysocolla in, 254 Roman bronzes, patinas on, 334-38 synthesis of, 307-309
malachite in, 121 ni2 Roman mythology, 3 use of, 310
recipes, 404-1 7 romerite, 147 variants of, 310
reconstructive events, in corrosion rosasite X-ray diffraction data for,
classification, 14 formation of, 116 309, 451t
I
red glass, opaque, 91-93 on Great Buddha, 162 schulenbergite, 6 2
red glazes, 9 3 - 9 4 properties of, 100,10 2 t, 116 properties of, i48t
redox potential, 79 2 Rouen green, recipe for, 283, 412 Schweinfurt green. See emerald
n
(
refractive indices R I ) , 422 t-23 t roxbyite, properties of, 227 t green
relative molar volumes ( R M V ) , 88 R P (reagent), 392 scientific instruments, finishes
Relief Fragment of Two Men rue, 290, 316 n20 on, 349, 351 n22
(Togati bronze), 213 p, 334 rural areas, outdoor corrosion rates sealing methods, 355-56
patina on, 214p, 334-35 , 335f, in, 53, 531, 54 seawater
336, 337, 338 f components of, 64
Renaissance bronzes, xii S oxygen in, 67, 70
Saint John the Baptist Preaching pH of, 64, 68
patinas on, 329-3 3
repatination, of cleaned surfaces, (Raphael), copper pollution in, 67
374-76, 396n2 résinâtes in, 297- 98 salinity of, 64
replacement Saint Mark's Basilica (Italy) Sekmet, figurine of, chalconatron-
electrochemical, 2 0 - 2 1 bronze horses of, copper ite in, 117, 364
positive, 72-77 oxalates on, 305 serpentite, in seawater, 68, 69 f
resin(s) copper pin from, chalconatron- Shahnama manuscript, 189ρ
coatings with, 384 ite on, 364 shakudo alloys, patinas on, 88 - 89
Laropal aldehyde, 376, 397n29 Saint Peter's Basilica (Italy), doors shallow marine zone, 661, 67, 68
pine, 295-96 of, patina on, 331 shattuckite, 252
résinâtes, copper, 204p , 205p , salts. See copper salts; specific properties of, 2531
294-99 types shellacs, 383 - 84
resistance of polarization measure- sampleite, 243 - 46 Shellsol 71, 376, 397n28
ments, 395 in arid environments, 243 - 46 shi-kin alloy, 89
Rest on the Flight into Egypt as corrosion product, 198 p, shipwreck sites, 71
(Domenichino), copper 199 p, 241, 243-46 cassiterite at, 71
support in, 318 properties of, i98p, 241, 242 t, connellite at, 139
Rhus verniciflua, polymerization 244-45, 245 f conservation methods at, 370
of, 77 stability of, 242 f, 243-44 , 244 f covellite at, 228
R I . See refractive indices thermodynamic data for, 1361 paratacamite at, 71
Riace bronzes, 351 nil X-ray diffraction data for, 244, spertiniite at, 98
black patina on, 3 2 8 - 2 9 246, 4281 sulfides at, 2 2 8 - 2 9
conservation treatment of, 370 San Michèle church (Italy), door tenorite at, 95
corrosion products on, 120, of, 331 siderite, as corrosion product, 229
328-29 San Pietro church (Italy), wall Sigismund III, King, column of,
paintings of, 111 patina on, 404

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