Mount a cross section of a lamella in Melzer's Reagent. Compare the colour of the walls of the tramal hyphae in Melzer's Reagent to the colour in a water mount.

In general, this character is only utilised for genera with a white or pale spore print.

Choose this state if: there is no change to the colour of the walls of hyphae in the lamellar trama when mounted in Melzer's Reagent.