Analysis of Taylor's H-glaze Sample

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.

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.

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.

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.