Reticulin stain

Hi, I am preparing solutions for a reticulin stain.  This is my first time using Ferric Ammonium Sulfate, or doing a reticulin stain.  When mixing Ferric Ammonium Sulfate in Distilled Water is the solution supposed to be Rust/Light orange colored with a white precipitate that will not dissolve?  If so is this solution supposed to be filtered?  Any other recomendations would be appreciated, thanks for your time.

Jason Sullivan
Chicago, IL

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