Why should a material analysis be regarded with some scepticism?
Mining Companies analyse the raw materials they supply and will often blend to achieve consistency. Your pottery supplier should be able to give you the analysis of any material they supply. You should bear in mind that lines may be discontinued if deposits run out. In such cases a substitute will have to be found. You may well come across analyses of wood ashes. Do not presume that, for example, all apple ash has the same analysis. A tree’s chemical analysis will depend on its environment let alone its species. Raw materials are usually supplied with a specific water content (about 5% to reduce dust). This will not need to be taken into account when formulating glazes if all the raw materials have the same water content. Due to evaporation the water content of a material will vary and this will in turn have an effect on the percentage of that material in a glaze recipe.
Related Questions
- I am doing a plane stress analysis and the geometry even though consisting of a single material has 2 regions with different thicknesses. How do I specify these?
- In the oval pipe analysis the stresses are non-linear with pressure, are the material properties also non-linear?
- Why should a material analysis be regarded with some scepticism?
