State Historical Society of Iowa

Collections Care: Glass, Ceramics and Stone

Glass, ceramics, and stone have been used by humans for thousands of years to make everything from art and food vessels to building and finishing materials. Plastic, a man-made late-comer to the group, offers an inexpensive, supremely-shapable alternative to these traditional materials and is now finding its way into museum collections worldwide.

The main causes of deterioration for glass, ceramic, and stone objects are breakage and internal flaws that are either inherent or originating in an object’s past use, which can make it more susceptible to damage from heat, moisture, or fluctuating humidity levels. As with any museum or personal collection, appropriate handling techniques and storage are the first line of defense in the preservation of objects made from any of these materials. For glass and ceramics, use only nitrile gloves or
clean hands due to their slippery surfaces (unglazed ceramics should be handled with nitrile gloves only). For stone objects, either nitrile or cotton gloves may be used. Minimize handling of all objects and never
pick up by handles or decorative motifs. Always support the object with both hands and practice general good housekeeping in storage and exhibition areas. Further tips on caring for glass, ceramics, and stone can be found below.

Glass and Ceramics

Stone and Plaster