TL;DR: To buy perfect porcelain, examine translucency, check the unglazed foot for a white, glassy body, and tap the rim for a clear ring. Prioritize hard-paste porcelain with even glaze and no chips, crazing, or warping.
Step 1: Know the Three Porcelain Types
Hard-paste porcelain is fired at about 1,400°C and is the most durable; it is what most fine dinnerware and collectibles use. Soft-paste porcelain is fired lower, looks creamier, and chips more easily. Bone china contains at least 30% bone ash, giving it high translucency and strength. Decide your purpose before shopping: daily use calls for hard-paste or bone china; display pieces can be soft-paste.
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Step 2: Test Translucency and Color
Hold the piece against a light. True porcelain glows with a warm, slightly blue-white light; bone china shows a softer, ivory glow. If it looks opaque or gray, it may be stoneware or a low-grade imitation. Also check that the color is consistent across the body and glaze—yellowish patches can signal uneven firing.
Step 3: Inspect the Glaze and Surface
Run your fingertips over the entire surface. The glaze should be smooth, even, and free of pinholes, bubbles, or rough patches. Look for crazing—fine spiderweb cracks—especially on older or cheaply made pieces. Crazing weakens the body and traps stains. Under strong light, tilt the piece to catch reflections; wavy or distorted reflections mean an uneven glaze.
Step 4: Check the Foot and Rim
Turn the piece over. The unglazed foot ring should be smooth and white or light gray, not gritty or dark. A dark foot often means earthenware. On cups and bowls, the rim should be even and thin but not sharp. Tap the rim gently with a fingernail: a clear, bell-like ring indicates a sound body; a dull thud suggests a crack or poor firing.
Step 5: Look for Warping and Fit
Place plates and saucers on a flat counter. They should sit flush without rocking. Stack two plates—if they wobble, one is warped. For sets, check that lids fit snugly and handles align. Warped porcelain cannot be fixed and will worsen with heat.
Step 6: Verify Marks and Origin
Look for a backstamp or maker’s mark. Reputable porcelain brands mark their pieces with country of origin, material, and sometimes a date code. Be wary of unmarked “porcelain” from unknown sources; it may be low-fire ceramic. If buying vintage, research the mark to confirm age and authenticity.
Step 7: Test Durability and Care
Ask about dishwasher and microwave safety. Most hard-paste porcelain is dishwasher-safe, but bone china and gold-trimmed pieces are not. Avoid sudden temperature changes—porcelain can crack from thermal shock. Wash fine pieces by hand in warm water with mild soap.
FAQ
Q: Is bone china better than porcelain?
A: Bone china is a type of porcelain with bone ash; it is more translucent and slightly stronger, but hard-paste porcelain is more chip-resistant for daily use.
Q: How can I tell real porcelain from ceramic?
A: Real porcelain is translucent when held to light, has a white glassy body at the unglazed foot, and rings clearly when tapped. Ceramic is opaque and sounds dull.
Q: Should I buy porcelain with crazing?
A: No. Crazing indicates a weak glaze, allows stains and bacteria into the body, and reduces value. Choose pieces with intact, smooth glaze.
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