How do I date an old piece?

Dating relies on examining the potting technique, the characteristics of the foot rim, and the specific shade of the cobalt blue used in the decoration. Different periods favoured distinct clay bodies and firing methods that leave physical clues. Examining factory marks or handwritten underglaze ciphers provides further context, though many early or provincial items remain unmarked and must be judged entirely by style and material.

Are these items safe for daily use?

Most antique pieces function better as decorative objects or for dry display rather than rigorous daily dining. Glazes from earlier centuries can exhibit crazing or wear that makes them unsuitable for modern dishwashers. Gentle hand washing in lukewarm water preserves the glaze and prevents chemical damage to the delicate ceramic body over time.

What is the difference between porcelain and earthenware?

Porcelain is fired at much higher temperatures until the clay vitrifies into a dense, non-porous material that often rings when struck and can show translucency under light. Earthenware is a softer, more porous ceramic that requires an opaque glaze like tin to seal the body. Understanding this distinction helps identify the regional origin and likely period of manufacture for individual items.

Why does the blue colour vary so much?

Variations in blue tones stem from the purity of the cobalt ore used, the thickness of the application, and the exact temperatures reached inside the kiln. Asian cobalt often yielded a brilliant, deep sapphire, while European copies developed greyer or softer indigo hues. Changes in preparation techniques across different decades also shifted the chemical reactions during the firing process.