SAFETY FIRST

What's really in your tableware?

The things manufacturers don't put on the label, and why we think you should know.

Lead in Ceramic Glaze

Lead has been used in ceramic glazes for centuries. It makes colours more vivid and creates a smooth, glassy finish, and it's cheaper than safer alternatives.

The problem: if a piece isn't fired at precisely the right temperature, lead doesn't fully bond to the ceramic surface. It leaches into food, especially acidic foods like tomato-based curries, chutneys, citrus, and pickles. The foods most Indian
households eat daily.

What the research says:

  • In August 2025 the US FDA warned households against a list of imported cookware that leached lead in testing, and has added products to it since. Most of the items came from India. They were aluminium and brass rather than ceramic, so this is not evidence about glaze, but it is the clearest recent reminder that food-contact ware reaches kitchens with nobody having measured what it gives up.

  • Lead has no known safe level of exposure. The World Health Organization lists ceramic glazes among the sources of lead exposure and states that no level of exposure to lead is known to be without harmful effects.

  • Children may absorb up to four to five times as much lead as adults from an ingested dose, according to the World Health Organization, and lead can permanently affect brain development.

  • India does not currently have an equivalent consumer-facing warning system for ceramic tableware. That gap is exactly why awareness matters.

Want to switch? See ceramic plates made in India. We test our glazes for lead and cadmium release at an NABL-accredited laboratory, to ISO 6486 Part 1 and Part 2. Prefer to sip safe? Our ceramic mugs are tested for safety too, with no bone ash, for chai, coffee, and everyday drinking. If you want to check a plate you already own, and see why a home kit cannot answer it, read how to test ceramic plates for lead.

Cadmium in Ceramic Pigments

Cadmium compounds are used in red, orange, and yellow ceramic pigments. Like lead, cadmium can leach into food if not properly processed. Long-term exposure is linked to kidney damage and weakened bones.

The same FDA warnings that flagged lead also test for cadmium. Most Indian consumers have never heard of it.

Bone Ash in Bone China

Bone china, the kind of tableware found in most Indian households, contains 30–50% bone ash. That's calcium phosphate derived from animal bones, typically from slaughterhouses.

India has one of the world's largest vegetarian populations. Many households that observe dietary principles around non-harm and purity eat every meal off plates made with animal bone. It's simply not something most people know to check.

For reference: LaOpala, one of India's largest crockery brands, has specifically marketed their products as '100% Bone Ash Free' with a vegetarian symbol, because the demand is real once people know.

If you want to make the switch, see our bone-ash-free dinnerware, mineral stoneware, zero animal bone, vegetarian-safe.

Comparison Table: Claymistry vs Industry Norm

What we test for Claymistry standard Industry norm
Lead in glaze
Tested for lead release
Not disclosed by most brands
Cadmium in pigments
Zero, cadmium-free pigments
Not disclosed by most brands
Bone ash in clay body
Zero, bone ash free
30–50% in bone china
Food safety testing
Yes, tested per ISO 6486
Rarely mentioned or verified
Microwave safe
Yes, all tableware
Varies
Dishwasher safe
Yes, all tableware
Varies

How to Check Your Own Tableware

A simple guide for your own kitchen

1. Check for labels. Does your tableware state it's lead-free? If there's no mention of materials, there's usually a reason.

2. Look at the glaze. Highly decorative, brightly coloured ceramics, especially hand painted or traditional pieces, are more likely to use lead-based glazes.

3. Consider the source. Unbranded ceramics from local markets or deep-discount online sellers rarely undergo material testing.

4. Do not rely on a home test kit. Swab kits are calibrated for flat painted surfaces rather than fired glaze, so a negative result cannot clear a piece and a positive one can be triggered by surface residue. Neither outcome is something you can act on. A laboratory release test is the only way to answer it. See how to test ceramic plates for lead at home.

5. When in doubt, ask the brand. A company that can't tell you what's in their glaze is telling you something.

Q: How do I know Claymistry products are really lead-free?

A: We test our glazes for lead and cadmium
release to ISO 6486 Parts 1 and 2 at an NABL-accredited laboratory.

Q: Is Claymistry tableware safe for children?

A: Yes. We test our glazes for lead and
cadmium release at an NABL-accredited laboratory, and use bone-ash-free materials only. See how we test our glazes for details. Children are more vulnerable
to lead exposure than adults, which is exactly why we hold this standard
without exception.

Q: What's the difference between stoneware and bone china?

A: Stoneware (what Claymistry makes) is
dense ceramic fired at high temperatures, durable, food-safe, made entirely
from clay and minerals. Bone china contains 30–50% bone ash (animal bone
powder). Both can be beautiful, but the materials are very different. See our bone-ash-free dinnerware range.

Q: Are your products safe for acidic foods like curries and chutneys?

A: Yes. Lead leaches more readily with
acidic foods, which is why we test our glazes for lead and cadmium release. See how we test our glazes for details. Our ceramics are
tested for food contact and safe for all types of food.

Q: Do you have test reports I can see?

A: We test our glazes for lead and cadmium
release to ISO 6486 Parts 1 and 2 at an NABL-accredited laboratory. Lab test reports can be shipped at additional cost. Email
contact@claymistry.in with the product name.

Q: What does lead-free ceramic actually mean?

A: Used precisely, it means the glaze does not release meaningful amounts of lead into food. Used loosely, which is more common, it means only that the seller believes there is no lead in the glaze recipe. The two are not the same, and only the first can be measured. Ask whether a release test was run rather than whether the piece is lead-free.

Q: Is lead-free ceramic dinnerware regulated in India?

A: The phrase itself is not policed on consumer listings. Food-contact ceramic ware is expected to be assessed for lead and cadmium release, with ISO 6486 as the reference method, but there is no consumer-facing certification mark for it and no routine enforcement of the label. The useful question is about evidence rather than wording.

Q: How can I tell if my ceramic plates have lead?

A: Visually, you cannot, and you cannot test for it at home either. Bright, hand-decorated, unbranded or antique pieces carry more risk than plain, marked, modern ones, and a dull or crazed glaze is a reason to retire a plate from food use. A home lead-testing swab is not reliable on fired glaze in either direction. A release test at a laboratory is the only way to answer it properly. See how to test ceramic plates for lead.

Q: Does a higher firing temperature make a glaze safer?

A: It helps, but it is not a guarantee on its own. Firing to a full vitrification range bonds the glaze to the body and closes surface porosity, which reduces what a glaze can give up. Formulation still matters, and so does consistency between batches. Temperature is one input, not the proof.

How to test ceramic plates for lead

Why home kits cannot answer it, and what a laboratory release test actually measures.

Read the guide

How we test our glazes

We test our glazes for lead and cadmium release at an NABL-accredited laboratory. What we check, and why.

Read how we test our glazes