Without science art cannot be successful
Student, Harris Chobham Academy
The results of the scientific analysis alongside historical research and material testing helped us to develop two recipes so we could make our own porcelain. The patent created on 6 December 1744 by Bow Porcelain relied on a white clay mined by the Cherokee nation in North Carolina, a form of kaolinite. No objects are known from this period, so we couldn’t analyse them. This is the recipe we have created based on the information given in the historic patent:
40g Kaolin
10g Potash Feldspar
10g Quartz
The second Bow ‘New Canton’ patent from 1749 describes the innovative use of calcined bone ash (calcium phosphate) as a flux, which they called “virgin earth”. They were the first English manufacturer to use bone ash, an important precedent for what is sometimes called ‘Bone China’ that you might still use in your kitchen today. We remade their recipe based on the scientific analysis conducted on the London Borough of Newham objects:
15g Ball Clay
15g Quartz
28g Bone Ash
2g High Alkaline Frit
(Optional: add 0.05g cobalt oxide to the mixture, giving it a ‘mushroom’ tone)
Art and Science sixth-form students from Harris Chobham Academy – which is based just a 15-minute walk away from the former site of the Bow Porcelain Factory – worked with us to test these porcelain recipes and use plaster casting techniques to re-make Bow Porcelain Factory sculptures.