Could you please let me know what % of Ammonia water is used for distain Masson Trichrome? Or what % is most common used? Thank you. Lin S. Bustamante, B.S., H.T.(ASCP) VIBS Histology Laboratory Supervisor College Of Veterinary Medicine Texas A&M University College Station, Texas 77843-4458 Phone: (979) 845-3177 Fax: (979) 458-3499