Copper Staining: Usually caused by corrosion of copper screens, gutters or downspouts washing down on painted surfaces. Can be prevented by painting or varnishing the copper.

 

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Copper Staining: Usually caused by corrosion of copper screens, gutters or downspouts washing down on painted surfaces. Can be prevented by painting or varnishing the copper.

Coppery: bright infusion of good quality black tea

Non-Staining Colors: Pigments that can be lifted cleanly (wet or re-wet) with little or no discoloration of the underlying paper fibers.

Staining Colors: Colors that cannot be fully removed from your paper. Staining colors permeate the fiber of the paper and leave a permanent tint. Check your hands after painting, the hardest colors to wash o . . . View Full Definition

Staining Developer: Developer, such as pyro, in which the oxidation products give extra image density by staining the gelatin.

Copper Toning: Chemical process used for toning monochrome prints. See toners.

Copper Sulfate: Chemical contained in certain bleaches, toners, intensifiers, and reducers.

Copper (Cu): Atomic number: 29, Atomic mass: 63.546 g.mol -1, Electronegativity: 1.9, Density: 8.9 g.cm-3 at 20°C, Melting point: 1083 °C, Boiling point: 2595 °C, Vanderwaals radius: 0.128 nm, Ionic radi . . . View Full Definition

Copper Chloride: Chemical contained in certain bleaches, toners, intensifiers, and reducers.

Copper Peptide: Compound consisting of a peptide (small fragment of protein) and copper atom, known to benefit in tissue regeneration therapy, used in treating wounds and skin lesions, but also gastrointest . . . View Full Definition