I’ve been getting a lot of requests for a more detailed explanation and a safety review of non-stick Ceramic coated cookware. Exactly how safe are the ceramic coatings? While PTFE (Teflon) has had its share of negative publicity there have also been a lot question marks about ceramic and ceramic coated cookware. Concerns include the possibility of metals and toxins leaching into food: lead, cadmium and even arsenic! Other readers have asked about the ‘non-stick’ life of a ceramic coated pan. Do they stay non-stick for long? And if they scratch, are poisonous toxins leaching into your food?
Manufacturers and marketers of ceramic coated cookware claim they are ultra safe, with no chemicals or heavy metals and are very durable…..
BUT ARE THEY?
We set out to find out.
Consider this your ultimate guide to the safety, ease of use and durability of non-stick ceramic coated cookware.
What is Ceramic coated cookware?
Ceramic technically means ‘clay that has been fire hardened’. So when we talk of ceramic coated cookware, we are talking about some sort of metal (usually hard anodized aluminum) that has been coated with a layer of ceramic. Ceramic non-stick coatings are typically made from inorganic minerals, primarily silicon and oxygen. Inorganic means not containing any carbon.
So does that mean it Is it PTFE and/or PFOA free?
Yes, none of these chemicals are used in the manufacture of Ceramic coated cookware.
So its made of inorganic materials. Why should I care?
Several reasons. The inorganic composition of Ceramic non-stick coating makes it a more environmentally friendly product.
Basically, the composition is the same as sand or stone!
Additionally, it allows for easier application during manufacturing. Most PTFE (Teflon) based non-stick coatings require at least 3 applications. Ceramic coatings requires as little as one layer. They also needs less time to cure, which reduces oven time, saves energy and emits 50% less carbon dioxide than PTFE based products.
And how is this inorganic sand-like mineral applied to cookware?
Most ceramic non-stick coatings are applied using a Sol-gel process. Sol-Gel is a process that converts the inorganic liquid Solution into a Gel that can be applied to any metallic substance. Sol-gel coatings are applied either by spray or by dipping the item in the mineral gel which is then hardened by a high heat firing process known as curing.
What about heat resistance?
Because of its inorganic nature, ceramic coated cookware is heat resistant up to 450 C. That’s roughly 842 F. Just so you can compare, Teflon and similar coatings will deteriorate after 500 F.
How safe is it?
According to various ceramic manufacturers, even if you accidentally heat a ceramic coated pan beyond 450 C, it will not emit any toxic fumes, unlike a Teflon coated pan. Nor will it break down. Which means it’s safe for humans, birds and pets.
What about lead or cadmium in the Ceramic coating?
There have been reports of some ceramic glazes that leach lead or cadmium into food. This is typically true of ceramic cookware from Latin American and Asian countries where regulations may be a bit lax. In the US there are strict FDA requirements (via a law known as Proposition 65) for ceramic products to be free of lead or cadmium. All reputable companies comply or should comply with these requirements.
In order to be sure, we reached out to the German company Weilburger Coatings, the maker of the Greblon® non-stick ceramic coatings (used in Ozeri, Healthy Legend Cookware and Josef Strauss Cookware to name a few) to ask about the safety of the coating. Here is their response:
As Greblon-Ceramic coatings are designed for food contact, of course there is no danger of lead leaching from the coating. The product has been tested to meet US-American as well as European Food contact regulations. Naturally, for us to market safe products, food contact for us means no lead, no cadmium, no PFOA, no PFOS .
Head of R&D, WEILBURGER Coatings GmbH
So like I said earlier, you can be quite sure that Ceramic coated cookware that is sold in the US by reputable companies is safe to use.
The key takeaway here is that if you are in the market to buy a ceramic coated non-stick pan or set, you want to be sure to pick well established brands that have no issue declaring that they are free of these toxins. [Tweet This!]
What about the non-stick properties?
Here’s where the debate starts! According to the manufacturers of ceramic non-stick coatings like Thermolon and Greblon, these coatings provide a superior non-stick release than traditional non-stick pans. They say the coatings are durable, scratch and abrasion resistant and will not corrode.
In reality, people either love it or hate it. For some it performs well over years, while others have found the non-stick properties don’t last long at all, despite caution and care. A lot of people found that the life of the non-stick element of a ceramic coated pot is one year.
Is there any way to extend the life of a ceramic coated non-stick pan?
Yes, here are some suggestions:
- Wash using only a mild detergent in hot water with a dishcloth or sponge. Avoid scour pads of any type
- Cook on low to medium heat.
- Don’t make the pan go from hot to cold too quickly
- Wash by hand – even if the manufacturer says its dishwasher safe
- Use plastic or wooden spoons. Metal utensils can chip or scratch the ceramic surface, making the non-stick surface less non- stick.
Can you cook on high heat with a ceramic non-stick coated pan since it is heat resistant up to 450 C?
As a general guidelines, most food should be cooked on no higher than medium to medium-high temperatures anyway. This not only preserves the nutrition of food but also prolongs the life of any pan. There are a few exceptions, of course, like stir-fries and searing steaks. But even then, there is no need to hit super high temperatures during cooking.
So to answer the question, a ceramic coated pan should, in theory, be ok with higher heat however be careful with sudden temperature changes, i.e. from high to low or low to high. That could make the ceramic coating shatter or crack.
So if non-stick ceramic coating is like stone, it should be ok to use Metal Utensils, right?
It is recommended to always use wooden, plastic, silicone or nylon utensils with any non-stick. Stainless steel utensils could scratch or damage any non-stick coating, whether Teflon or Ceramic which would reduce the life of the pan.
Can you wash pans with non-stick ceramic coating in the dishwasher?
Depends on the brand. Many ceramic coated non-stick pans will say they are dishwasher safe. But as always, we at The Cookware Advisor strongly recommend you hand wash all pans with a mild detergent and hot water without any abrasive pad.
Can they be used in the oven?
Depends on the handles of the brand you buy. If the handles are all stainless steel, most pans are good till about 500 F. If handles are silicon, then stick to 350 F.
So, are non-stick ceramic coated pans a healthier and more environmentally safer choice? Yes. Primarily because at higher temperatures, the coating won’t break down and emits fumes that are bad for the environment and an irritant for humans. At normal cooking temperatures under 500F, they are no more or less healthier than a PTFE (Teflon) coated pan.
Is ceramic coating the best type of non-stick that is designed to last? Consensus seems to say ‘no’.
In fact, in all the tests conducted by Whitford, a major supplier of all types of non-stick coatings, it was found that the best ceramic coating will last only 15% as long as a PTFE (teflon) based coating. Meaning 6 times less!
In the end, when considering Ceramic coated cookware, the choice is really more about being environmentally safer and healthier (at higher temperatures), rather than choosing a better non-stick pan. If you want great non-stick, nothing comes close to a good quality ‘Teflon ®’ i.e. PTFE based non-stick coating. But if you want a pan that is better for the environment and your health, then Ceramic coated cookware might be for you.
Which non-stick ceramic coated cookware does The Cookware Advisor recommend?
We did find in our research that compared to other non-stick ceramic coatings, Thermolon and Greblon stood out in terms of quality. Here are the recommended products/brands if you are looking for ceramic coated non-stick cookware:
Best Thermolon coated cookware brands: (made by Thermolon Corporation}:
Best Greblon coated cookware brands: (made by Weilburger Coatings Germany):
Other Notable Non-Stick Ceramic coated pans:
Neoflam, the brand that uses Ecolon Ceramic coatings has also just come out with a line of premium ceramic coated cookware called the Carat Collection. It’s named that because the look is aesthetically pleasing with a diamond like design on the lid. We don’t know yet how it performs so time will tell. But one thing is for sure, it is visually stunning. Check it out here
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