How do I date a delft jar?

Dating relies on examining the tin glaze composition, foot rim characteristics, and the style of the cobalt painting. Earlier pieces often display thinner glazes with slight crazing and distinct pigment pooling. Changes in shape from bulbous seventeenth-century forms to slender nineteenth-century proportions also help establish the manufacturing period.

Were apothecary jars used for medicine?

Apothecary jars held medicinal herbs, wet syrups, and dry powders in historic dispensaries and pharmacies. Their painted labels identified the specific contents for the apothecary. Over time, these utilitarian vessels transitioned into decorative display items prized for their historical inscriptions.

How do I display these jars safely?

Displaying these ceramics requires stable shelving away from direct sunlight and high-traffic areas where accidental knocks might occur. Placing them on flat, level surfaces protects their fragile rims and foot rings. Lidded pieces benefit from securing the cover with museum putty if placed in earthquake zones or busy rooms.

What is the difference between porcelain and earthenware?

Porcelain is fired at extremely high temperatures, resulting in a vitrified, non-porous body that rings when struck. Earthenware is a softer, porous ceramic fired at lower temperatures and coated in an opaque glaze. Tin-glazed earthenware, or delftware, relies on its surface glaze to seal the porous clay body underneath.