Kiln Burn A darkened area on a piece of stoneware that occured during the firing process when the piece of stoneware was located too close to the fire source.
Salt Drip The greenish drip marks that are sometimes found on stoneware if too much salt collected at the top of the kiln and subsequently dripped onto the pieces during firing.
Stack Mark Because of the expense associated with firing stoneware, the potters would pack the kilns with as much stoneware as possible, stacking pieces side by side and on top of each other, separating each piece with clay spacers. The spacers prevented the salt from reaching the stoneware during the firing process, and resulted in unglazed areas on the stoneware.
Stone Ping The common term for the blemish that appeared on the surface of the stoneware when the clay wasn't thoroughly cleaned before using, leaving behind small stones that exploded during the firing.
Water Glass A preservative used for storing fresh eggs that interacted with the eggshell and caused a chemical reaction that bonded with the glaze, creating white stains on the surface of the stoneware.
All photographs and text are the sole property of Mad River Antiques, LLC and may not be used without written permission
An early 19th century two gallon stoneware jar with a beautiful form, marked BOSTON. It's in very good condition, with minor chips, some stone pings that occurred in the firing and a long hairline on front.
Click on thumbnail to enlarge photo
Click on thumbnails to enlarge photos
A White's Utica pitcher with the Spirit of '76 on one side and the profile of General von Steuben on the other, measuring 8 1/2" high. It was made to commemorate the Nation's 1876 Centennial. There is a long hairline by the spout and a minor one on the base.