[pure-silver] Re: acrchival wash in cold water?
- From: "Nicholas O. Lindan" <nolindan@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Fri, 15 Apr 2011 20:36:59 -0500
"Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
I suspect this stuff is similar to the "blueing" sold
for laundry purposes.
Blueing is colloidal Prussian Blue - the same pigment of cyanotypes
and spent Farmer's reducer. It works by hiding yellow.
http://en.wikipedia.org/wiki/Prussian_blue
http://en.wikipedia.org/wiki/Bluing_%28fabric%29
I am pretty sure the brighteners in paper are fluorescent dye.
http://en.wikipedia.org/wiki/Optical_brightener
--
Nicholas O. Lindan
Cleveland Engineering Design, LLC
Cleveland, Ohio 44121
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