[pure-silver] Re: acrchival wash in cold water?
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Fri, 15 Apr 2011 23:20:54 -0700
----- Original Message -----
From: "Nicholas O. Lindan" <nolindan@xxxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Friday, April 15, 2011 6:36 PM
Subject: [pure-silver] Re: acrchival wash in cold water?
"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
You are probably right. I never knew what Blueing was.
Evidently the fluorescent dye is used in laundry detergent
because clothes fluoresce under UV light.
--
Richard Knoppow
Los Angeles
WB6KBL
dickburk@xxxxxxxxxxxxx
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