Mollier's trichrome
for Elastic and Collagen


Weigert's iron hematoxylin or equivalent
Solution A
Orcein 0.8 g
Hydrochloric acid 1 mL
Ethanol, 100% 50 mL
Distilled water 50 mL
Solution B
Azocarmine 2 g
Acetic acid, glacial 1 mL
Distilled water 100 mL
Solution C
Phosphotungstic acid 5 g
Distilled water 100 mL
Solution D
Naphthol green B 1 g
Acetic acid, glacial 1 mL
Distilled water 100 mL

Tissue sample
5µ paraffin sections of neutral buffered formalin fixed tissue are suitable. Other fixatives are likely to be satisfactory. Most trichrome stains benefit from picric acid or mercuric chloride fixation. Formalin fixed tissues may benefit from secondary fixation of sections in Bouin's fluid.


  1. Bring sections to water via xylene and ethanol.
  2. Place into solution A for 12 hours.
  3. Stain nuclei with Weigert's iron hematoxylin for 1-3 minutes.
  4. Differentiate the nuclear stain if necessary.
  5. Wash with water for 15 minutes.
  6. Place into solution B for 15-30 minutes.
  7. Rinse with distilled water.
  8. decolorise in solution C for 2-6 hours, changing the solution three times.
  9. Rinse quickly with distilled water.
  10. Place into solution D for 15-30 minutes.
  11. Agitate vigorously in 95% ethanol for 30 seconds.
  12. Dehydrate with ethanol.
  13. Clear with xylene and mount with a resinous medium.

Expected results


  1. Solution A is the Unna-Taenzer elastic solution.


Gray, Peter. (1954)
The Microtomist's Formulary and Guide.
Originally published by:– The Blakiston Co.
Republished by:– Robert E. Krieger Publishing Co.
    Mollier, (1938)
    Zeitschrift für wissenschaftliche Mikroskopie und für mikroskopische Technik,
    v.55, pp.472.
    von Kahlden, C. and Laurent, O., (1896)
    Technique microscopique, pp.143
    Carré, Paris, France




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