Abstract: This invention relates to temperature indicators, particularly the invention relates to temperature indicators which can be used to indicate the temperature of temperature changing material or element. The disadvantages of prior art solutions include the toxicity of the material acting as an indicator or the poor ability to detect the colour change. In the solution according to the invention, the temperature indicator contains bismuth oxide and potentially one or more colouring pigments mixed into the bismuth oxide.

Abstract: A cooking vessel, such as kettle, frying pan or cooking pot, has a bottom part suitable for heating by induction. In solutions known before, an attachment of ferromagnetic plate, placed at the bottom, to blank container is multistage, demanding exceptional precision and/or non-reliable. In addition, in solutions known before, stainless steel is used; to which use some disadvantages are related. In the present invention a plate is used as ferromagnetic member, which is coated, at least from its one surface, by another material, such as aluminum. Ferromagnetic piece is attached e.g. by pressure welding to blank container. In solution provided by the invention it is possible to use an iron plate as ferromagnetic material.