Blue Iris for washing.
Fri, 17 Feb 2006 12:38:10 PST
In a message dated 2/17/2006 2:00:37 P.M. Eastern Standard Time, writes:

and it  indeed made the water
blue. Just what this product was I do not know. Could  it have been
derived from an Iris root?

Old fashioned laundry blue was derived from prussian blue, an iron  compound. 
 You can still get it in some places in a liquid form. Now, most  laundry 
detergents are colored blue for the same "whiter than white"  reason.
Mark  Mazer
Intarsia Ltd.
PO Box 142
Gaylordsville, CT  06755

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