Blood Collector

Blood Lab (1F, East Wing), on the bench (ch03). If you never pick it up, a spare appears at the ARK Lab Entrance (B2).

Collects Infected Blood from buckets, stains, dead infected and Transfusion Bags and turns it into items through recipes: Handgun Ammo, 12.7×55mm Ammo, Med Injector, Hemolytic Injector, Molotov Cocktail, Bottle of Acid, Stabilizer and Steroids. It holds 100 (150 with the Override Manual, 200 with the Matsuoka Master Manual too); whatever a bag overflows is lost.

Recipes unlock when you analyse the Blood Specimens: Denatured (Blood Lab), Converged (1F Closet or Records Room) and Reversible (Blood Reports Room). Insanity adds a fourth, Polymerized.

Always pick it up, except on a run for the Minimalist challenge (35,000 CP), which asks you not to.