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Analysis
of Taylor's H-glaze Sample |
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Analysis
of the first sample was performed on a Cam-Scan series 4 scanning electron
microscope. Three test were performed. They were
a general (wide area) analysis including both the ferrous deposit and the
substrate, a spot analysis of the deposit and finally, an analysis of just
the substrate. |
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As can
be seen from the above, Calcium (Ca), Carbon (C) and Oxygen (O) predominate.
These are the constituents of the substrate chalk or calcium carbonate -
CaCO3. The Silicon (Si) is certainly due to fragments of flint
which were in abundance in the area. The smaller quantities of Aluminium
(Al) may be due to Lime-Felspar (CaAl2Si2O8).
The trace quantities of Phosphorous (P) could be due to superphosphate fertilizers
put on the land by the farmer. The same may be true for the last trace element
Potassium (K) which occurs in plant ash as Potassium Carbonate and is sold
as pot-ash. |
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In
the analysis of the Ferrous deposit, as would be expected, Iron (Fe) and Oxygen
predominate confirming the principle constituents of H-glaze. Calcium and Silicon
existed here only in trace quantities. This accords with later cross section
examination of the first sample which revealed that most of the small fragments
of these elements initially seen during optical microscopic examination were
on the surface of the glaze and almost absent from the body of the glaze. The
relatively strong response from Carbon could be due to the fibrous plant material
observed in the sample. |
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The
final trace showing the analysis of the substrate can be considered as a control.
However, the small peaks indicating the presence of Iron are probably due to
contamination. Certainly, during chemical analysis of soil samples taken from
the field, no Iron was found. The remaining trace element Magnesium (Mg), which
appeared in this last trace, was probably in combination with Calcium Carbonate
with which it readily forms Dolomite - MgCa(CO3)2. |
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