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Commercial Industry standard test strips for Autoclaves and Pressure cookers. A must for anyone using a pressure cooker to sterilise substrate or grain spawn.
These are the same strips that we use in our Commercial Industry Autoclave and are also perfect for home use.
Simple paper strips that change colour when the strip reaches 121°C, this is the temperature required for true sterilisation.
Put a test strip inside your substrate or spawn bag that is in the centre of your pressure cooker, this is the bag that will take the longest to get to temperature. If after you have run your pressure cooker the test strip in the centre bag has changed colour then you have confidence that you have successfully sterilised your substrate.