How to Care for a Stoneware Crock

Examine the crock carefully. The first step in caring for an object of antiquity is to study its condition. Identify the glaze. Common glazes include lead, alkaline, salt, Albany (a slip) and Bristol (also a slip). Some crocks may also have painted decorations or labels. Each type of surface treatment can present unique preservation problems. Look for small pieces of glaze flaking off the ceramic body, abraded glaze, chips and hairline cracks.

Handle crockery carefully. Hairline cracks can turn into major fractures when a crock is handled roughly. Careful handling will also reduce the risk of dropping. Keep crockery away from pets, children and high-traffic areas.

Control the environment. Crockery is not as sensitive to temperature and humidity as many other types of antique objects. However, extreme humidity fluctuations and temperature can damage the glaze, paint or other aspects of the crock. Avoid freezing and thawing since this process can cause cracks and fractures, particularly if small cracks are already present.

Store and display crockery in a safe area. Crocks need to be stored or displayed in such a manner as to avoid bumping and abrading with other objects and people or pets. Also be mindful if the crock has contents for either display or storage. Make sure its contents are not damaging the glazed surfaces.

Clean crockery carefully. If it is possible, "retire" antique stoneware crocks and turn them into simple display objects. Continued use and washing will degrade its condition and put the crock at continued risk of dropping and other damage. If washing is necessary, first make sure that washing will not remove loose glaze. Try cleaning the crock with just water, and then use a mild detergent only if necessary. Contact a professional conservator for advice on removing stains or material that does not clean off easily with water or mild detergent.