Leucocrystal Violet Presumptive Blood Test

Many investigators use this highly sensitive test as a confirmatory test after the Phenolphthalein Presumptive Blood Test.  A positive presumptive yields a deep blue color.  Packaged in a plastic box with all the necessary premixed chemicals and supplies to conduct a Leucocrystal Violet Blood Test. 

The premixed liquid reagents are in plastic dropper bottles.  A non-human known blood standard is included to monitor the results.