BLACK SATIN Arterial Fluid has a higher level of formalin.  But like our MICO-Lan Arterial Fluid, it contains a combination of pure water-soluble lanolin 1686, a special dehydration inhibitor, a blood drainage activator, and the two special fluid dyes.  The formulation of BLACK SATIN Arterial Fluid prevents dehydration under most conditions and produces excellent cosmetic effects with more tissue firmness.