The basics A blood with the same consistency as Flowing Blood Syrup but safe for use in the mouth.  The benefits Cleans up well with shaving cream or Ivory soap. The Look Bright - To suggest arterial bleeding or oxygen enriched blood, also for use on dark colored surfaces, or in low-light situations. Dark - To suggest vascular bleeding or oxygen depleted blood. Also for use on light colored surfaces. Extra Dark - Same color as our Drying Blood except that it does not dry. The Pro Tip Safe for use in mouth. May be squirted directly from bottle.