A slightly opaque, light viscosity, heavily pigmented blood. Used when pumping blood through small diameter tubing or when a rapid flowing blood is required. EXTRA DARK – Same color as our Drying Blood except that it does not dry. DIRECTIONS: To achieve optimum color, turn container up side down for several hours before use, then SHAKE WELL. Pour directly into pumping apparatus. Used when pumping blood through small diameter tubing or when rapid flowing blood is required. Cleans up well with shaving cream or Ivory soap and warm water.