All that glisters is not gold”. A colorimetric assessment of the touchstone for gold ternary alloys
Bibliographic Data
| ID | 12988374 |
|---|---|
| Authors | Arnaud Manas (0000-0002-1373-5968, Banque de France, corresponding author) |
| Year | 2020 |
| Volume | 44-1 |
| Pages | 51-62 |
| Publication date | 2020-01-01 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | ArchéoSciences (JOURNAL) |
| Journal identifiers | ISSN: 1960-1360 • E-ISSN: 2104-3728 |
| Publisher | OpenEdition (PUBLISHER) |
| DOI | 10.4000/archeosciences.7247 |
| OpenAlex | W3123610343 |
| Language | EN |
| Citations received | 1 |
| References cited | 39 |
The principles behind the touchstone have never been investigated in a scientific manner, even though there are many technical and historical accounts of its effectiveness. In this article I investigate whether and to what extent the content of Au-Ag-Cu ternary alloys can be visually ascertained with a touchstone without acid. I show that it is very likely to be true as the touchstone solves several problems (illumination, surface state and curvature, etc.) and makes it possible to carry out a luminance comparison. A colorimetric approach confirms the high level of accuracy attained
Carry (investment · Curvature · Economics · Geometry · Luminance · Ternary operation · Chemistry · Computer Science · Cultural Heritage Materials Analysis · Mathematics · Pigment Synthesis and Properties · Surface Roughness and Optical Measurements · Artificial Intelligence
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Touchstones
A place of great trust to be supplied by men of skill and integrity’
A Reappraisal of the Specific Gravity Method for the Analysis of Gold Alloys
An Alchemical Manuscript by Arnaldus de Bruxella
| Citations per year | 0.25 |
|---|---|
| Citation span | 2022 - 2022 (1) |
| Highly cited | No |