A very deep, rich red with some browns. The name is perfect, it does look like blood. This ink could double up as Halloween make-up should you wish.
This ink is very dark on ivory coloured paper, appearing more of a deep brown than than a red. Therefore I tend to not use it often, preferring to use Waterman Absolute Brown instead as it is lighter.
Like all saturated Diamine inks I have used, there tends to be a build up of residue on the nib. It cleans away quite well but should this clump move on the nib it can interfere with the line being put down by the pen. This has at times changed the writing performance of my nibs from extra-fine to more like stub nibs. It does lead to some interesting results, though not reliably.