Abstract: An etching device for the electrolytic etching of copper on an etching material, includes a first mixing device, which is designed to receive an acid electrolyte containing copper ions, and an oxygen gas or ozone gas in order to form a first liquid-gas mixture which can be channeled from a first outlet of the first mixing device into a connecting line coupled thereto; a container, which contains a container liquid, a second mixing device, which is arranged in the container and is surrounded by the container liquid, wherein the second mixing device includes a suction opening in order to suction in the container liquid present in the region of the suction opening, wherein the second mixing device is connected to the connecting line and is designed to channel the first liquid-gas mixture and the suctioned container liquid into a constricted zone of the second mixing device so that the suctioned container liquid mixes with the first liquid-gas mixture and is thus able to form a second liquid-gas mixture, wherein

Abstract: A method of controlling the operation of a steam generator in a fabric treatment appliance may include controlling the operation of the steam generator in response to a rate of temperature change of the steam generator and/or controlling the operation of the steam generator in response to a rate of temperature change of a receptacle for receiving fabric items to be treated.

Abstract: A method of controlling the operation of a steam generator in a fabric treatment appliance may include setting an operational temperature for the steam generator based on calcification of the steam generator. A change in the calcification of the steam generator may be determined by behavior of the actual temperature of the steam generator in response to changing a flow rate of water supplied to the steam generator.

Abstract: A method of controlling the operation of a steam generator in a fabric treatment appliance by changing a flow rate of water supplied to the steam generator to determine a change in calcification of the steam generator.

Abstract: A method for cleaning a steam generator may include supplying water to the steam generator and boiling the water in the steam generator to separate and expel at least some deposits in the steam generator.

Abstract: A method of controlling the operation of a steam generator in a fabric treatment appliance may include controlling the operation of the steam generator in response to a rate of temperature change of the steam generator and/or controlling the operation of the steam generator in response to a rate of temperature change of a receptacle for receiving fabric items to be treated.

Abstract: A method of controlling the operation of a steam generator in a fabric treatment appliance by changing a flow rate of water supplied to the steam generator to determine a change in calcification of the steam generator.

Abstract: A method of controlling the operation of a steam generator in a fabric treatment appliance may include setting an operational temperature for the steam generator based on calcification of the steam generator. A change in the calcification of the steam generator may be determined by behavior of the actual temperature of the steam generator in response to changing a flow rate of water supplied to the steam generator.

Abstract: A method for cleaning a steam generator may include supplying water to the steam generator and boiling the water in the steam generator to separate and expel at least some deposits in the steam generator.