| Title: |
The composition of the soda-rich and mixed alkali plant ashes used in the production of glass
|
| Issue: |
J Archaeol Sci 33 (9) |
| Series: |
Journal of Archaeological Science
|
| Volume: |
33
(9)
|
| Page Start/End: |
1284 - 1292 |
| Biblio Note |
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|
| Publication Type: |
Journal
|
| Abstract: |
Previously published data for soda-rich plant ashes used in the production of glass and faience are brought together and re-assessed, and new analytical data are presented for ashes produced from plants collected in Egypt, Greece and the UK. In the production of these ashes, the plants of interest are salt resistant, halophytic plants of the Chenopodiaceae family, growing in coastal, salt marsh and desert regions. A primary criterion in selecting ashes for glass and faience production is that the alkalis are predominantly in the form of carbonates, bicarbonates and hydroxides rather than either chlorides or sulphates. For the ashes produced from Salsola kali plants collected from Greece and the UK, the soda to potash ratios (0.3--1.8) do not show any systematic differences between the regions in which the plant was growing, but instead reflect the fact that this species favours the accumulation of K+ over Na+ ions. Further, the results suggest that S. kali could have been the source of the mixed alkali ashes used in western Europe, if the ashes had first been treated in some way in order to reduce their lime-plus-magnesia contents. |
| Year of Publication: |
2006
|
| Subjects / Periods: |
| Salt (Auto Detected Subject) |
| Mixed Alkali Plant Ashes (Auto Detected Subject) |
| Glass (Auto Detected Subject) |
|
| Source: |
BIAB
(The British & Irish Archaeological Bibliography (BIAB))
|
| Relations: |
|
| Created Date: |
11 Jun 2007 |
