For an everyday porcelain cup with a sound, glazed surface, start with lukewarm water, mild dishwashing liquid and a soft sponge. If a brown tea stain survives washing, a tea-stain remover approved for that cup is a better next step than scrubbing harder. Check the cup’s care instructions as well as the cleaner’s label before soaking it.
Start with a normal wash
Empty the leaves and leftover tea, then wash the cup individually in a basin lined with a soft mat or towel. Use the soft side of the sponge, working around the inside and under the rim. Rinse thoroughly and let the cup dry before putting it away. Avoid moving a hot cup straight into cold water.
Metal scourers, abrasive pads and scraping with a knife can damage the surface or decoration. A stain that resists a soft sponge is a reason to change the treatment, not the pressure.
If a brown ring remains
Oxygen-based kitchen stain removers are an option for suitable modern tableware. Noritake and Narumi recommend them for their own products. For a different cup, check its care instructions first, especially if it has painted decoration, a metallic rim or a special glaze.
Choose a product explicitly intended for porcelain drinking vessels, and read its exclusions. Some tea-stain removers are restricted to dishwasher-safe items and exclude gold or silver. If the cup has no suitable care guidance, ask its maker or seller before using a stain-removal treatment.
When both sets of instructions allow the treatment, use the cleaner’s stated dilution, water temperature and contact time. Rinse with clean drinking water as directed before using the cup again. A spoonful copied from another product’s instructions is not a reliable dose.
What about baking soda or vinegar?
These are not interchangeable remedies. Wedgwood recommends a baking-soda paste for coffee marks on its bone china, while its vinegar advice concerns hard-water spots. Neither instruction is a universal recipe for tea-stained Chinese porcelain. For an unfamiliar cup, use its own care guidance rather than working through a succession of household mixtures.
Look at where the colour has settled
The Azure Blanc cup pictured above has blue flowers covering the inside as well as the outside. Include the interior when checking a decorated cup’s care instructions. Our guide to decoration beneath and above the glaze explains why the position of the colour matters.
A mark following fine glaze lines needs a different assessment from a ring on a smooth interior. Avoid trying to bleach colour out of crackle lines. Staining on an unglazed rim or around a filter hole also calls for care advice specific to that surface, rather than a longer soak. For an antique or repaired cup, consult a ceramics conservator before attempting stain removal.
For daily-use teaware, wash soon after the last pour. Cleaning promptly helps keep residue from becoming harder to remove, and leaves less work for the next tea session.
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