A systematic examination of colour development in synthetic ultramarine according to historical methods.
Clicks: 132
ID: 86092
2013
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This
article has not been analysed, so there is no overall score —
reader engagement is measured and shown alongside.
Reader Engagement
Popular Article
30.0
/100
132 views
12 readers
AI Quality Assessment
Not analyzed
Readership in this journal
PopularRanked #1,935 of 2,056 articles by views in PloS one
Most read
Least read
Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 2,056 in total.
Mint this article as an NFT
Not yet mintedCreate a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.
5
SUSD
one-off · no wallet required
Abstract
A number of historical texts are investigated to ascertain the optimum conditions for the preparation of synthetic ultramarine, using preparative methods that would have been available to alchemists and colour chemists of the nineteenth century. The effect of varying the proportion of sulphur in the starting material on the colour of the final product is investigated. The optimum preparation involves heating a homogenised, pelletised mixture of kaolin (100 parts), sodium carbonate (100 parts), bitumen emulsion (or any 'sticky' carbon source) (12 parts) and sulphur (60 parts) at 750°C for ca. 4 hours. At this stage the ingress of air should be limited. The sample is allowed to cool in the furnace to 500°C, the ingress of air is permitted and additional sulphur (30 parts) is introduced before a second calcination step is undertaken at 500°C for two hours. The products obtained from the optimum synthesis have CIE ranges of x = 0.2945-0.3125, y = 0.2219-0.2617, Y = 0.4257-0.4836, L* = 3.8455-4.3682, a* = 4.2763-7.6943, b* = -7.6772-(-)3.3033, L = 3.8455-4.3682, C = 5.3964-10.8693, h = 315.0636-322.2562. The values are calculated using UV/visible near infrared spectra using Lazurite [1], under D65 illumination, and the 1931 2° observer.
| Reference Key |
hamerton2013aplos
Use this key to autocite in the manuscript while using
SciMatic Manuscript Manager or Thesis Manager
|
|---|---|
| Authors | Hamerton, Ian;Tedaldi, Lauren;Eastaugh, Nicholas; |
| Journal | PloS one |
| Year | 2013 |
| DOI |
DOI not found
|
| URL | |
| Keywords |
Citations
No citations found. To add a citation, contact the admin at info@scimatic.org
Comments
No comments yet. Be the first to comment on this article.