Black Decoration

Photos, E., R. E. Jones, and Th. Papadopoulus (1994), The black decoration on a Myce-nean dagger, Archaeometry 36, 267-275. 

A. Andreotti, I. Bonaduce, M.P. Colombini, F. Modugno and E. Ribechini, The diagnosis of the yellowing of the marble high reliefs and the black decorations in the chapel of the tomb of Saint Anthony (Padua Italy), Ini. J. Mass Spectrom., 284, 123 130 (2009). 

Slip coatings, ochre red and black decoration, impressed designs, by about rouletting, incised decoration, control of oxidation-reduction during firing... 

Only about 10 elements, ie, Cr, Ni, Zn, Sn, In, Ag, Cd, Au, Pb, and Rh, are commercially deposited from aqueous solutions, though alloy deposition such as Cu—Zn (brass), Cu—Sn (bronze), Pb—Sn (solder), Au—Co, Sn—Ni, and Ni—Fe (permalloy) raise this number somewhat. In addition, 10—15 other elements are electrodeposited ia small-scale specialty appHcations. Typically, electrodeposited materials are crystalline, but amorphous metal alloys may also be deposited. One such amorphous alloy is Ni—Cr—P. In some cases, chemical compounds can be electrodeposited at the cathode. For example, black chrome and black molybdenum electrodeposits, both metal oxide particles ia a metallic matrix, are used for decorative purposes and as selective solar thermal absorbers (19). 

The desire to replace cadmium is generally attributed to its toxicity, both in terms of process pollution and product corrosion, and several alternatives are feasible thicker zinc, tin-zinc alloy or tin-nickel alloy depending upon the precise application " . The demise of decorative nickel-chrome systems in the automotive industries of the world is partly due to cost and partly to market image, and not to technical performance where major improvements took place in the period 1960-1975 through the establishment of duplex nickel under-layers and micro discontinuous chromium top-layers. In the 1980s the trend has been towards black finishes produced generally by powder-applied epoxy polymers. 

Figure 8.42. ID structural models with inherent loss of long-range order, (a) Paracrystalline lattice after HOSEMANN. The lattice constants (white rods) are decorated by centered placement of crystalline domains (black rods), (b) Lattice model with left-justified decoration, (c) Stacking model with formal equivalence of both phases (no decoration principle)... 

FIGURE 45-5 Filaments extracted from the brains of patients with dementia with Lewy bodies (DLB) and multiple system atrophy (MSA) or assembled from bacterially expressed human a-synuclein (SYN) were decorated by an anti-a-synuclein antibody. The gold particles conjugated to the second antibody appear as black dots. Scale bar lOOnm. 

Decorative plating, 9 765-767, 769 Decor paper, 18 129 Decorticated black pepper, 23 162-163 4-Decylaniline (4DA), 14 479-480 n-Decyl chloroformate, molecular formula, 6 291t... 

The hydrothermal carbons obtained in the end from soluble, non-structural carbohydrates are micrometer sized, spherically shaped particle dispersions, containing a sp2 hybridized backbone (also responsible for the brown to black color) decorated with a dense layer of polar oxygenated functionalities still remaining from the original carbohydrate. The presence of these surface groups offers the possibility of further functionalization and makes the materials more hydrophilic and well-dispersible in water. The size of the final particles depends mainly on the carbonization time and precursor concentration inside the autoclave, as well as additives and stabilizers potentially added to the primary reaction recipe. An SEM image of a model reaction illustrating this dispersion state is shown in Fig. 7.1. 

---