In a message dated 2/17/2006 2:00:37 P.M. Eastern Standard Time,
johnbryan@worldnet.att.net 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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