Iron pots and rocks in the south are strictly made.

1, rice washing water rust removal: iron pots, shovels, kitchen knives, iron spoons and other cooking utensils can be used and immersed in concentrated rice washing water, which can not only prevent rust but also remove rust.

2. Alum derusting: The iron pan can be derusting by the following methods: pour about 1 kg of clean water into the iron pan, add about 50g of alum, boil for10min, and then wipe it repeatedly with a brush or rag.