How are 1920s glass bowls cleaned?

Wash them gently by hand in lukewarm water using mild detergent and a soft cloth. Avoid abrasive sponges and harsh chemical cleaners to protect delicate frosted or opalescent surfaces. Dry the vessel immediately with a lint-free cloth to prevent water spots. If the piece includes silver or enamel mounts, keep moisture away from the metal joins.

How do I spot an opalescent finish?

Hold the vessel up to direct light to observe the characteristic milky-blue glow along the raised edges and high-relief details. When light passes through from behind, the glass often shifts to an amber or warm tone. True opalescent glass is achieved through specific chemical cooling agents rather than surface coatings. This property remains integral to the material structure throughout the body of the bowl.

What defines Art Deco glassware?

Art Deco glassware relies on symmetry, stylised natural forms like flowers and fish, and bold geometric structures. Makers embraced industrial techniques to create tactile surfaces with high-relief ornamentation. The style rejects Victorian clutter in favour of clean lines and functional elegance. Pieces often combine moulded glass with contrasting materials like silver plate, enamel, or frosted finishes.