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HIMT, glass composition and commodity branding in the primary glass industry

Abstract : New elemental data confirm the proposal by Ceglia et al. (2015) of two sub- groups of high iron, manganese and titanium glass, HIMTa and HIMTb, differing in their ratios Fe2O3/ TiO2 and Fe2O3/ Al2O3. Neodymium and strontium isotopes are consistent with south- eastern Mediterranean coastal sand for both groups, allowing for an identifia-ble strontium contribution from the added manganese. Trace elements are consistent with an Egyptian origin, although a marked Eu anomaly in HIMTa is correlated with Ba, again added with manganese. Strong within- group correlations between manganese and iron oxides are not easily explained either as deliberate additions of manganese decol-ouriser or as a characteristic of the glass- making sand. Instead, HIMT glass is considered to have been deliberately tinted yellow- green by the primary glass makers to distinguish it from the green- blue glass of the Levant. The colour branding of the raw glass allowed glass workers to distinguish sodium- rich Egyptian HIMT glass from the more viscous, high working temperature Levantine glass, thereby offering savings in marginal costs, such as those relating to fuel.
Keywords : Glass
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https://hal-univ-orleans.archives-ouvertes.fr/hal-02611661
Contributor : Scd Université d'Orléans <>
Submitted on : Monday, May 18, 2020 - 3:19:45 PM
Last modification on : Tuesday, May 19, 2020 - 1:46:13 AM

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  • HAL Id : hal-02611661, version 1

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Ian C. Freestone, Patrick Degryse, James Lankton, Bernard Gratuze, J. Schneider. HIMT, glass composition and commodity branding in the primary glass industry. Daniela Rosenow, Matt Phelps, Andrew Meek and Ian Freestone (Eds). Things that travelled, Mediterranean glass in the First Millennium CE, UCL Press, pp.159-190, 2018, 9781787351172. ⟨hal-02611661⟩

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