By @forensicfield
What is Teichmann Crystal Test?
Dr. Ludwig Karl Teichman discovered a test for detection of blood in 1853. later the test name as Teichmann Crystal Test.
It’s Uses In Forensics
It’s a Confirmatory test for blood.
It is also known as Haematin crystal acid test or haemin test.
It is used in detection of blood from dried stains.
Basis Of The Test
In Teichmann Test hemoglobin converted to haemin crystals which converted to salt in presence of halogen after then rhombic crystals forms.
Indication for the Presence of Blood
It produced Dark brown Color and rhombic shape if blood is present.
How To Perform This Test ?
Drawbacks
Rust and Exposure or combination of these can interfere with the test.
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