In article ,
Phil Addison writes:
On 29 Apr 2005 09:22:36 GMT, in uk.d-i-y
(Andrew Gabriel) wrote:

In article ,
Phil Addison writes:
Blood:
- soak in biological washing powder in cold water (I think! not sure)
yes (probably). also if you just rinse it off before it dries it wont
stain in the first place.

Plain soap and water will work for a while even after it dries.
However, eventually the red blood cells break down releasing their
iron, and that's much harder to remove. The thought just occured
to me (although I've never tried it) that a rust remover such as
phosphoric acid might work once that's happened.

I can't recall what it is, but I thought there was a chemical that
removes rust stains. A reducer presumably; but that would leave iron
which you say is hard to remove.

Phosphoric acid removes rust -- I'm not sure what any stain might
look like afterwards (maybe a large hole;-). As I said, I haven't
tried it -- it only occured to me as I was typing the previous
response. I might have some in gel form somewhere, and I can
probably find an old blood stain which no longer washes out somewhere...

--
Andrew Gabriel