Bone China

What is Bone China?

In the 18th Century, English potters invented Bone China to compete with the porcelain being imported into Europe. It combines bone ash (animal bone) with the hard-paste porcelain ingredients kaolin and china stone. It is fired at 1200 – 1300 °C. This formula is still used today.

Bone China

Case Study: Early C20th Crown Staffordshire Bone China Teacup

The fragments were cleaned with a weak solution of non-ionic detergent, followed by controlled use of a Derotor Steam Cleaner GV. Staining to cracks was removed using a poultice made up of an enzyme washing powder and deionised water. Fragments were bonded using a water-white conservation grade epoxy resin. Chips were filled with an epoxy paste made from water-white epoxy resin, fumed silica and artist’s dry powder pigments. Chips were polished with various grades of sanding fabric and then a plastic polish. Finally, missing areas of gilding were water-gilded with 23.5ct gold leaf.

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