Frequently asked questions

FAQ Products

Frying Pans

  • Which frying pan should I use for which foods?

    For foods which easily stick to the base of a frying pan – fried eggs, dough-based foods and rice, for example – it’s best to use a non-stick frying pan (PTFE). You can use less cooking fat or oil, but you will also need to make sure the frying temperature is not too high.

    If you want to prepare food which needs to be fried at a high temperature – to sear meat, for example – you should use a frying pan with a titanium coating.

    For foods which need to be fried at a very high temperature, we recommend a frying pan with a ceramic coating, or a non-coated frying pan.

  • What different types of frying pan are available?

    Frying pans are available in different materials such as iron, stainless steel and aluminium. They also come in a wide range of sizes, with or without non-stick coating.
    Take a look at our website to see a list of the different products available, with detailed descriptions.
    If you have any further questions or want qualified advice, please visit one of our Kuhn Rikon outlets or contact our customer service.

  • Why does food stick to my ceramic frying pan?

    The ceramic coating is not non-stick like PTFE (Teflon).
    Ceramic frying pans are ideal for searing meat at very high temperatures.

  • Why do I have to season my Black Star?

    The Black Star is a carbon steel frying pan.
    To ensure it does not corrode, it is treated with a black antirust coating.
    Before you use the pan for the first time, you need to “season” it in order to clean this coating.
    How to do it:

    Please note, the pan needs to be seasoned, not burned!
    1. Rinse the pan well with water.
    2. Put potato peelings or sliced potatoes, 100-200ml sunflower oil or peanut oil and some salt into the pan and fry for approx. 30 minutes on medium heat (maximum: 3/4 heat) until the potatoes are dark, but not black. Discard the potatoes and the oil.

    This procedure serves to remove any residue from the antirust coating, and also covers the pan with a layer of oil – which then helps to prevent starchy and protein-rich foods from sticking to the pan.

  • Why has my Black Star pan gone rusty?

    The Black Star is a carbon steel frying pan.
    Frequent use can result in scratches which expose the carbon steel.
    To prevent rust from developing, you must make sure the pan is always dried thoroughly after coming into contact with water. Take a sheet of kitchen paper and rub a little cooking oil over the pan to prevent it from rusting.

  • How should I look after my Black Star?

    The Black Star is a carbon steel frying pan.
    Frequent use can result in scratches which expose the carbon steel.
    To prevent rust from developing, you must make sure the pan is always dried thoroughly after coming into contact with water. Take a sheet of kitchen paper and rub a little cooking oil over the pan to prevent it from rusting.

    Non-stick effect
    To create a non-stick effect, heat the pan on a medium heat and add a cup full of dry salt. As soon as the pan is hot, rub it with an old cotton cloth. The salt will remove any frying residues and make the pan shine again. Allow the salt to cool in the pan and then discard it or store and reuse for the same purpose. Take a sheet of kitchen paper and rub a little cooking oil over the pan.

  • How should I clean my frying pan?

    The method of cleaning depends on whether your frying pan has a non-stick coating or not.

    In general, frying pans should never be cleaned in the dishwasher if you want them to last for a long time.

    If the frying pan is only lightly soiled, simply wipe it clean with a soft cloth or a piece of kitchen paper.

    If it is heavily soiled, or food residues are stuck to the bottom, proceed as follows:

    If your frying pan has a PTFE or Teflon coating, clean it with washing up liquid and a soft cloth.

    If it has a ceramic coating, clean with washing up liquid, a soft brush or a soft cloth.

    Uncoated stainless steel frying pans can be cleaned with washing up liquid and a hard brush or steel wool.

    Do not use washing up liquid on cast iron frying pans; clean them with water and a hard brush only. Then dry the pan thoroughly, take a sheet of kitchen paper and rub a little cooking oil over the pan.

  • Can I use my frying pan in the oven?

    If your frying pan has a plastic handle, it is only ovenproof up to 150°C.
    Frying pans with steel handles are ovenproof up to 250°C.
    The Blackstar frying pan is ovenproof up to 280°C.

  • Why do I need a grill pan?

    Grill pans enable you to grill food quickly and with less oil. They’re also quick and easy to clean and put away. And for indoor barbecues when it rains or snows.
    The sear marks also look really great – whether on meat, fish or vegetables.


  • Can I use my frying pan on an outdoor barbecue?

    If your frying pan has a plastic handle, the temperature of the barbecue must not exceed 150°C.
    Frying pans with steel handles are suitable for barbecues up to 250°C.
    The Blackstar frying pan is suitable for barbecues up to 280°C.


  • Can I use my pan in the microwave?

    Read the operating instructions for your microwave to see whether you are allowed to put metal objects inside.
    If you are unsure, contact the manufacturer and ask.

  • The handle of my frying pan wobbles. What should I do?

    f the handle of your frying pan has come loose, check the following:

    If the pan is in regular use, has the screw perhaps loosened?
    If so, you can remedy the problem yourself by simply tightening the screw with a screwdriver.

    Is the handle wobbly even though it is not fixed on with a screw?
    Please contact our customer service.

  • Why does my frying pan jiggle on the hob?

    The base of the frying pan can become warped if it is subjected to a very high temperature and then cooled rapidly. However, it will return to its original shape once it is hot again. To prevent warping from occurring, allow the pan to cool down a little before rinsing it under cold water.

  • What’s the difference between a frying pan which is suitable for an induction hob and one which isn’t?

    Frying pans for induction hobs have a ferromagnetic base. These pans can be used not only on induction hobs, but also on gas, iron and ceramic hobs.

    Pans which are not suitable for induction hobs do not have a ferromagnetic base, which means they can be used on any type of hob except for induction.

  • What is PTFE or Teflon?

    Due to its low surface tension and good thermal resistance, PTFE (polytetrafluorethylene) is used as a non-stick coating for frying pans and other pans.

    Caution must be taken when using PTFE-coated frying pans to ensure they do not overheat. Particular care should be taken if you are using such a pan on an induction hob – here it is wiser never to turn the heat on full power.

  • Is my frying pan free of PFOA?

    None of our frying pans contain PFOA (perfluorooctanoic acid).

  • Which oil should I use for frying?

    Use oils or fats with a high smoke point.
    In general, this is the case for oils and fats with a high proportion of monounsaturated fatty acids.

    Ghee, coconut fat, frying oil, peanut oil.
    Use “high oleic” oils on principle.


  • Can I use my pan in the microwave?

    Read the operating instructions for your microwave to see whether you are allowed to put metal objects inside.
    If you are unsure, contact the manufacturer and ask.

  • Will my DUROTHERM® work on any type of hob?

    The DUROTHERM® is suitable for all hob types. However, if you are using your DUROTHERM® on an induction hob, we recommend that you do not turn the hob onto full power, as this can stain the pan blue.

  • My DUROTHERM® is stained blue on the outside. What can I do?

    Blue stains on steel indicate overheating.

    In particular, the direct and indirect heat of gas or induction hobs can impact the outside wall of the pan.

    To minimise the effect on a gas hob, make sure the flames do not extend out over the base of the pan and touch the side walls of the pan for a long period of time.

    If you are using an induction hob, make sure the radius of the hob is not larger than the base of the pan. Induction hobs are more powerful than conventional hobs, so do not turn the heat on full.


    You can remove the stains by polishing the pan vigorously with a cloth and Kuhn Rikon Swisscleaner paste. Please feel free to ask our customer service for advice.
    Phone 052 396 01 01, email

  • Spots have appeared on my DUROTHERM® / Hotpan®. How can I get rid of them?

    These will probably be caused by limescale, so you can remove them with vinegar or Kuhn Rikon Swiss Easy Cleaner cream.
    If neither of these work, please contact our customer service.
    Phone 052 396 01 01, email

  • If I shake my DUROTHERM®, I hear a clanging noise. What is it?

    During the manufacture of the double wall, small solder balls may form in the soldering process. If these become dislodged during use, they cause a faint jingling noise.  This is no cause for concern, because it does not detract in any way from the quality or functionality of the DUROTHERM®.

  • How do I know whether my DUROTHERM® is leakproof?

    You can conduct this test by yourself.
    Leakproof test

    If you would prefer Kuhn Rikon to conduct the test for you free of charge, please send you DUROTHERM® to the following address.
    Kuhn Rikon AG, Service Centre, 8486 Rikon

  • Which ranges are affected by this problem?

    The Chrom, Messing and Forma ranges manufactured before 2010.

  • Was my pan manufactured before 2010? How can I tell?

    You can tell by looking at the base of the pan. If the number “01.11” is lasered on the base, for example, that means the pan was manufactured in January 2011.

  • Where should I send my Durotherm to have it tested?

    Kuhn Rikon AG, Service Center, 8486 Rikon


  • How do I know which size DUROMATIC® pressure cooker to buy?

    It depends on how many people you’re cooking for.
    If in doubt, too large is better than too small.

    For a family of 4, opt for a 5-litre pan.
    If you’re cooking for 1-2 persons, opt for 2.5 to 3.5 litres.

  • Must I have my DUROMATIC® serviced by Kuhn Rikon?

    If it works normally, it doesn’t need servicing at all.

  • How should I clean my DUROMATIC®?

    ou should wash up the lid, cover and pan by hand, and not put any of these parts in the dishwasher.

    Never use any aggressive cleaning agents or knives, steel wool or copper pads to remove stains or residues. If food has burned on in the pan, soak in hot water for an extended period of time and use a soft brush, sponge or cloth with a little washing up liquid.

    For stubborn limescale stains, use a few drops of vinegar, lemon juice or SWISS CLEANER cream.

  • Can I put my DUROMATIC® in the dishwasher?

    The lid and cover should not be put in the dishwasher.

    Although the pan itself is dishwasher-proof, we recommend
    you wash it by hand.

  • My DUROMATIC® isn’t working properly. What should I do?

    Does the pressure cooker have a leak?

    – check that the rubber ring has been inserted correctly
    – rub a little oil onto the rubber ring or moisten with a little water – or replace if necessary

    If, despite oiling the rubber ring, the lid can only be closed or opened by using force (indicating that either the lid or the pan has been deformed), the pan will need to be sent to a KUHN RIKON service point for inspection.

    If the SI valve (second safety valve) drops during cooking, this means that the pressure valve (first safety feature) has stopped working. Follow the procedure in the instruction manual for disassembly, cleaning and checking.

    If the pressure gauge gets stuck, you will need to take the valve apart and clean and check it.

    If this doesn’t help, we recommend you have the lid repaired.

  • What do I need to bear in mind when using the pressure cooker?

    ou’ll find everything you need to know in the instruction manual for your pressure cooker.
    • Never fill your pressure cooker more than 2/3 full. If the food you are cooking is likely to froth up, only fill it half full!  Never use force to open the lid. First allow all the steam to evaporate, then shake the pan gently and open.

    • Do not change the pan, lid, handles or valves in any way!

    • Replace the seals regularly. Only use original DUROMATIC® accessories with the pan.

  • How long does the DUROMATIC® product guarantee last?

    The Kuhn Rikon Group offers a 10-yr guarantee (date on receipt) for cookware, for material & workmanship. This guarantee does not cover stains, scratches, discolouring, normal wear and tear to components and seals or damage caused by overheating.

  • What is the difference between the black ring and the blue ring on the DUROMATIC®?

    The difference between the blue and black sealing rings is that the black ring is made of rubber while the new blue ring is made of silicone. There is no difference in functionality.

  • How do I change the safety valve on the DUROMATIC®?

    An instruction leaflet is enclosed with the new safety valve. It is very easy to insert the new valve if you lubricate it with a little oil first.

  • How do I know which size rubber ring to buy for my DUROMATIC®?

    Measure the diameter of the inside rim of the pan.
    Once you know the diameter, you can then order a replacement ring in our online shop.

  • Where will I find cooking times for the DUROMATIC®?

    If you look at the instruction manual for your DUROMATIC® pressure cooker, you’ll also find a list of cooking times.

    If you’d like to download the cooking times to your mobile phone or tablet, you can do so via Google Playstore or the Apple App Store.

  • Spots have appeared on my DUROMATIC®. How can I get rid of them?

    Rinse out the pan with hot water, then take a soft cloth and vigorously rub Swisscleaner cleaning paste into the affected areas. Finally, rinse again with water and rub dry. Repeat the process if necessary.

  • Do I have to use the sieve insert all the time?

    The sieve insert is primarily intended for pressure steam cooking vegetables and potatoes.
    Pour 100ml - 200ml of water into the DUROMATIC®, then add the sieve insert.
    Place the food you wish to cook directly onto the sieve insert. If you’re using the steamer basket, place the food inside this and then lay it on top of the sieve insert. Close the lid and cook on heat setting 1 or 2 as desired.
    The food will not burn on the bottom of the pan if you follow this method.

  • What am I doing wrong if food burns on the bottom of my DUROMATIC®?

    If you’re cooking with the sieve insert or the steamer basket, make sure you’ve added at least 100ml-200ml of water to the DUROMATIC®.

    If you’re making soup, a sauce, a starchy dish or risotto, please note the following:

    soups and sauces which contain starch tend to burn easily. For this reason, you should stir until it boils – and make sure the spoon has contact with the bottom of the pan as you stir. You can rest the lid on top of the pan, but not close it. When the soup or sauce starts to boil, you can close the lid and continue cooking under pressure.

    Wait until after the soup or sauce has been pressure cooked before adding corn starch or similar.


  • What accessories are available for the DUROMATIC®?

    We offer various steamer baskets and a juicer set for the DUROMATIC®.
    Visit our online shop. We’ll also be happy to help you in any of our Kuhn Rikon outlets.

  • At what point do I start counting the cooking time in the DUROMATIC®?

    Start counting the cooking time as soon as the respective valve setting has been reached.
    Depending on what food you are cooking, this is either heat setting 1 (first ring) or 2 (second ring).
    You’ll find the respective information in the instruction manual.
    You’re also welcome to download the free Duromatic app, which is available for both iPhones and android phones.


  • Why does my cheese always burn on the bottom of the pan?

    As the flame hits a certain spot on the base of the caquelon, this particular area gets hotter than the rest. To avoid this, use an aluminium distributor plate. This distributes the warmth evenly over the base of the caquelon and prevents the cheese from getting burnt on.

  • Can I take fondue fuel paste on an aeroplane?

    We strongly advise you not to do so.

  • Can I sharpen the coloured knives?

    Yes – using our special knife sharpener. With the dual knife sharpener, you can even sharpen serrated blades.

    You can purchase this item in our Kuhn Rikon online shop or in any of our Kuhn Rikon outlets.

  • Can I sharpen ceramic knife blades?

    Sharpening ceramic knives is relatively difficult, so it’s better to leave it to an expert.

  • How and where should I store my knives?

    There are two important considerations to bear in mind when storing kitchen knives.

    Firstly, you need to store your knives where they can be accessed quickly, but safely so that nobody gets injured.

    Secondly, the most important part of a knife is the blade, so you need to make sure this is protected.

    Depending on how much space you have, you can dedicate a special drawer and store your knives in sheaths, or store them in a knife block.
    Never just put knives in any old drawer without placing the blades in a sheath – the risk of injury is very high, and the blades will go blunt very quickly.

  • Can I put my knives in the dishwasher?

    Our knives are dishwasher-proof. However, they will stay sharper for longer if you wash them by hand.