Tumbler decorated with the Davenport technique and marked patent on the base English c1806.
Condition: Very good with no chips, cracks or restoration.
Davenport patent glass was decorated with the intention to imitate engraving or etching. The process was patented in 1806 by John Davenport and English potter and glass maker. The process involved covering the outer surface with a paste containing powdered glass, then removing the surplus paste so as to leave the intended design and then firing at low temperature to fuse the glass powder on to the surface.
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