Page 524 - Copper and Bronze in Art: Corrosion, Colorants, Getty Museum Conservation, By David Scott

Ρ Petrie Museum (England), conser­ positive replacement, 72-77
Paecilomyces varioti Bain, 3 vation treatment at, 354-55 posnjakite, 152 - 53
6
paintings, copper as substrate for, PH as corrosion product, 230
317-2 1 in Pourbaix diagrams, 32 in patinas, 152-53
analysis of, 3 1 9 - 2 0 of rainwater, 149-52 as pigment, 165,16 6
early coatings on, 317-I8 of seawater, 64, 68 properties of, 1481,15 2
4
enamel on, 321 of soil, 40 recipe for, 405 - 0 6
2
fabrication of, 318-19 phosphate(s) potassium aluminum sulfate, 8 7
P A N . See peroxyacetyl nitrates in burial environment, 37, 41 potassium copper acetates, X-ray
Panama, outdoor corrosion rates copper, 2 4 0 - 5 0 diffraction data for, 444 t
in, 531 in groundwater, 37 potassium copper carbonate
papegaaigroen, 270 hydrated synthetic basic, 2421 hydroxide hydrate, X-ray
paper, degradation of, 7 5 - 7 6 photochemical smog, and diffraction data for, 447 t
2
Papyrus Ebers, 78 corrosion rates, 47 potassium hydroxide, as drying
3
Paraloid B72, 8 0 , 8 4 photography, early, copper in, agent, 355-5 6
3
paratacamite, 124-25 26-27 potential(s)
3
benzotriazole and, 7 9 phthalocyanine blue, 208p corrosion, 17
and bronze disease, 128-29 Pictura (An Allegory of Painting) in electrochemical series, 16 -17
2
classification of, 124 (van Mieris), 09 p electrode, 32, 399
vs. clinoatacamite, 125 on copper sheet, 209 p, 320 Pourbaix diagrams
and patina authenticity, 131 pien yao glazes, 94 for aqueous environments,
as pigment, 134,139,190 ρ pigments, 6, 79. See also specific 3 2 - 3 4 , 33 f, 34 f
Pourbaix diagrams for, 135 f pigments definition of, 32
properties of, 123t, 124,139, i 9 0 p pine resin, in copper résinâtes, function of, 32
stability-field diagrams for, i 4 o f 295-96 limitations of, 3 4 - 3 5
6
thermodynamic data for, 13 1 pisanite, 146,147 local conditions in, 34
1
X-ray diffraction data for, 4251 pitting corrosion, 32-34,135 f, 1351 precipitation. See rain
zincian, 123,124,144 n2, 4251 plancheite, 252 preservation
Paris green. See emerald green properties of, 253 t of evidence, with mechanical
parrot green, 270 planerite, 247 cleaning, 357-5 8
particulate matter deposition, in plant fibers, mineralization of, without treatment, 357
indoor environment, 6 2 - 6 3 74-7 5 "A prostitute of the highest class
passive stabilization, 391-92 Plasticine, 396 n2 (oiran) in a garden," 190 ρ
patinas. See also bronze patinas plates, 169-223 protein(s), mineralization of, 73,
vs. corrosion, 10 plating 7 6 - 7 7
definitions of, 10, 329 arsenic, 22 proteinates, copper, 2 9 8 - 9 9
i
early use of term, 329 copper, s -19 pseudoboleite, cumengite and, 142
land vs. lake, 231 electrochemical, 2 0 - 2 6 pseudomalachite, 2 4 6
removal during conservation electroless, 20 as corrosion product, 241
2
treatment, 3 5 3 - 5 5 electroplating, i s as pigment, 240, 241, 4 6
2
repatination after cleaning, gold, 2 0 properties of, 241, 421
i
374-76 , 3 9 6 n 2 on iron, s -19 stability of, 242 f
water, 11 mercury, 22, 80 n6 vs. tagilite, 241, 2 5 1 m
1
4
P E G (polyethylene glycol) 00, platinum, deposition technique thermodynamic data for, 361
9
7 1 - 7 2 for, 21 Ptah, statuette of, 0,179 p
Peligot blue, 166 polarization, resistance of, 395 purple, Han, 203 p, 2 6 6 - 6 7
3
4
recipe for, 166, 0 6 polishing techniques, 78 P V C (polyvinyl chloride), 8 4
6
Pénicillium brevicompactum, 3 pollution pyrrhotite
Pénicillium cyclopium, 3 air. See air pollution as corrosion product, 229
6
Penn, William, statue of (Calder) water, 67 formation of, 230
(
antlerite on, 149 polyethylene glycol 400 P E G 400), Q
conservation treatment of, 6 1 71-72
3
peroxyacetyl nitrates ( P A N ) , 4 8 polymer coatings, 387- 88 Queen Victoria at Osborne
Scheele's
(Landseer),
3
Perspex, 8 3 polymerization, 76
polyvinyl chloride ( P V C ) , 384 green in, 310
S U B J E C T I N D E X
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