Chrome Alum Gelatin Slide Coating

Contributed by Luke Hammond, QBI, The University of Queensland, Australia

Chrome Alum Gelatin Slide Coating

Clean grease-free slides are needed for the slide coating to be effective.


200ml Distilled water 0.5g Gelatin 0.05g Chromic potassium Sulphate


  • Microwave briefly to dissolve the gelatin
  • Cool
  • Dip clean slides and allow to drain vertically.
  • Once completely dry pack into Slide boxes in a dust free environment.

This method is based, with permission, on an original protocol available here.