If the flame of the burner hasn't sufficient oxygen black carbon soot is deposited on the porcelain laboratory ware.
Nothing! but if you keep it in for a while, the flame turns orange
it turns purple when heated
When solids are heated they turn into liquid
This is caused by a prolonged dripping tap, normally with galvanised rusting pipes.
brown
the sugar in the milk is carmelized thus turning brown.
clay heated in a kiln really hot
Caramelization happens when sugars are heated until they melt and begin to turn brown. Thus foods with sugar in them (eg onions) can be heated and browned "caramelized".
Heated hot enough, which is very hot, porcelain decomposes. It is possible that the materials it forms could melt, I don't know.
If the flame of the burner hasn't sufficient oxygen black carbon soot is deposited on the porcelain laboratory ware.
Using porcelain pans on an electric stove is considered generally safe. Follow the manufacture's care suggestions and keep an eye on them Don't let them boil dry. Excessive heat can cause porcelain to melt.
Nothing! but if you keep it in for a while, the flame turns orange
Porcelain is the whitest. SwimmingFish....BROWN SERVER
it turns purple when heated
When solids are heated they turn into liquid
ferrous sulphate when it is heated it changes into red brown color