TL;DR: Buy porcelain by checking for a clear, bright ring when tapped and a smooth, glossy glaze without pinholes. Ensure the piece is lead-free, microwave-safe, and from a reputable manufacturer with consistent firing temperatures to guarantee longevity and safety.
1. Inspect the Glaze Surface
Start by running your fingers gently over the surface of the plate, bowl, or mug. High-quality porcelain should feel perfectly smooth, like glass. Look closely under bright light for any pinholes, which are tiny bubbles that burst during firing and leave small pits. These defects can harbor bacteria and make cleaning difficult. Also, check for any crazing, which appears as fine, spiderweb-like cracks in the glaze. While some traditional styles feature intentional crazing, it is generally considered a flaw in modern dinnerware as it compromises the integrity of the piece over time.
If you want to dig deeper, check out our guide on The Ultimate Porcelain Buying Guide: Types, Quality & Care.
2. Perform the Sound Test
Tap the piece lightly with a knuckle or a spoon. Quality porcelain emits a high-pitched, ringing tone that lasts for a second or two. If the sound is dull, short, or thuddy, the clay body may be underfired or of lower density. This test helps determine the material’s durability. A dull sound often indicates that the piece will be more susceptible to chipping or breaking under normal kitchen stress. Always compare the sound against a known high-quality piece if possible to calibrate your expectation.
3. Check for Warping and Flatness
Place the plate on a flat, level surface and look at it from the side. The rim should sit evenly without rocking. Warped pieces are unstable when stacked or used on the table, leading to spills and uneven heating. For mugs, ensure the handle is firmly attached and does not wobble. A well-made handle integrates seamlessly with the body, providing a secure grip without creating weak points that could snap during washing or use.
4. Verify Safety Certifications
Look for markings that indicate the product is lead-free and cadmium-free. This is crucial for items that will hold acidic foods like tomatoes or citrus juices. Reputable brands will clearly state that their products are microwave and dishwasher safe. Check the bottom of the item for these symbols. Avoid buying unlabeled porcelain, especially from unknown sources, as improper glazing can leach harmful heavy metals into your food over time. Safety should never be an afterthought when selecting daily-use tableware.
5. Examine the Base and Underside
Turn the piece over and inspect the foot ring. It should be clean, with no excess clay or slurry marks. The underside should be glazed to prevent moisture absorption, which can cause stains or warping over years of use. An unglazed base is common in some artisanal pieces but requires more care. Ensure the weight distribution feels balanced. Porcelain is known for being lightweight yet strong, so if a piece feels disproportionately heavy, it may be made from a different ceramic material rather than true porcelain.
6. Assess Color Consistency and Depth
If buying colored or patterned porcelain, check for uniformity in color. High-firing techniques result in vibrant, deep colors that do not fade. Look for any splotchy areas or uneven glaze flow, which can happen if the kiln temperature was inconsistent. For white porcelain, check for a pure, bright white rather than a yellowish or grayish tint. Premium white porcelain is often referred to as “bone china” or “hard porcelain” and should have a slight translucency when held up to the light.
7. Consider the Manufacturer’s Reputation
Research the brand before purchasing. Established manufacturers often have stricter quality control processes and better customer service for replacements. Read reviews specifically looking for mentions of chipping, discoloration, or breaking after a few months of use. Buying from a trusted retailer allows you to return defective items easily. Consider the intended use; if you plan to use the set daily, invest in a durable, high-fired line rather than a delicate, decorative collection
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