How do I date a blue glass perfume flask?

Dating relies on stylistic markers, glass technology, and metal mounts. Victorian pieces often combine opaline glass with heavy sterling silver collars, while Art Deco examples display geometric lines or moulded signatures. Assay marks and silver hallmarks provide precise years for mounted pieces. Pre-industrial Roman vessels are identified by their characteristic iridescence and archaeological form.

Were these flasks meant to be carried?

Many nineteenth-century examples were designed for chatelaine wear, featuring secure hinged lids or screw caps to prevent leaks while moving. Smaller pocket-sized bottles fitted easily into evening bags. Larger dressing table bottles remained stationary on trays. Their stoppers were fitted to seal the contents during daily use in the bedchamber.

How should I clean a vintage perfume flask?

Cleaning requires gentle methods to preserve old glass surfaces and delicate silver mounts. Warm water and mild soap suffice for removing interior residue without damaging ancient patinas or enamel. Harsh chemical dips must be avoided on silver parts to protect hallmarks and coloured glass. Cork stoppers should be kept dry to prevent disintegration.

What is the difference between opaline and opalescent glass?

Opaline glass is an opaque or semi-opaque material with a dense, milky body that diffuses light evenly. It was widely used in Victorian boudoir accessories for its rich colour saturation. Opalescent glass is semi-transparent and milk-like, scattering light to show milky blue or amber glows at the edges. This effect was favoured by Art Deco glassmakers to create dimensional depth.