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Firescale

Firestain is a layer of oxides that is visible on the surface of objects made of metal alloys containing copper when the object is heated, as by a jeweler heating a ring to apply solder during a repair. On copper-containing alloys of gold or of silver (such as sterling silver), it presents as a red or purple stain. This is because at high temperatures…

Events, Curative methods & Preventative methods

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Curative methods

ElectrostrippedCyanideNitric acidAnodeElectroplating
8 related topics

Preventative methods

HydrogenAmmoniaFluxesBorax
4 related topics

Overview

OxidesSolderSilverSterling silverOxygen
7 related topics

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Preventative methods

Curative methods

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Firescale

Nodes23
Edges22
Triples8
Avg. degree1.91
Density0.086957
Components1

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Important terminology

firestain piece layer heating alloys metal object used surface copper repair also methods silver oxygen however objects made sterling prevent

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
hydrogen or ammoniainstance ofPreventative methodsFirestain can be largely prevented by heating the object in an atmosphere in which the oxygen has been replaced with another combustive gas0.80text
polishinginstance ofCurative methodsTechniques0.80text
sandinginstance ofCurative methodsTechniques0.80text
grindinginstance ofCurative methodsTechniques0.80text
filinginstance ofCurative methodsTechniques0.80text
and wire brushing can be used to cure existing firestaininstance ofCurative methodsTechniques0.80text
nitric acid may be used insteadinstance ofsometimes other solutions0.80text
argentiuminstance ofor by using an alloy which is resistant to firestain0.80text

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