Before pyrolyzing the plate and annealing the metal oxides, it is helpful to dry the plate at a more moderate temperature. There are several options for this.

  • Gently heat on a hotplate.
  • Warm in an oven.
  • Allow to slowly air-dry.

The recommended method is oven drying.[1] A hotplate that is too warm may crack the glass, and air drying may not work at all, because some metal nitrate salts are quite hygroscopic.

  1. At what temperature? Is this the actual consensus (i.e. does everyone think oven is best)?