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mrsnesbitt
Joined: 28 Oct 2004 Posts: 1576
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cab
Joined: 01 Nov 2004 Posts: 32429
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Posted: Tue Jul 26, 05 9:58 am Post subject: |
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Hmmm...
I've got one idea that might tickle your fancy. Might not
How about making some cyanograms, on a cotton fabric. Get all of the best shaped buttons you've got, and keep them aside; big button holes will work particularly well.
Get some plain white cotton, and make up two solutions (we'll sort out where to get the chemicals from later- they ain't desperately hazardous, and they've been used for making Prussian Blue dye for a couple of centuries). The solutions being ferric ammonium citrate and potassium ferricyanide.
Make the two up in brown glass bottles (I'll dig out quantities later if anyone is interested). Then go to a dimly lit room, and mix some of them up. Soak the cloth in it till its good and damo, and let it dry in the dark (I should think hanging in an airing cupboard would work).
Now this is the clever bit; it's the generation of an insoluble iron complex in light that turns this murky looking material into a bright blue dye. Lay the dry cloth out on a board, put the buttons on top in an arrangement you like, and take the board out into some bright sunlight. After ten minutes or so (again, I'll look up the specifics later) take it inside, remove the buttons, and run it under water till the water runs clear. You'll have white patches where the buttons were on a blue fabric.
Classic old fashioned photochemistry, a process that pre-dates black and white photography. At one time copies of building designs were produced using this stuff, hence the term 'blueprint'. |
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Northern_Lad
Joined: 13 Dec 2004 Posts: 14210 Location: Somewhere
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helen_Mc
Joined: 16 May 2005 Posts: 9 Location: sheffield
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@Calli
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judith
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hils
Joined: 08 Mar 2005 Posts: 568 Location: Nottingham
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cab
Joined: 01 Nov 2004 Posts: 32429
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hils
Joined: 08 Mar 2005 Posts: 568 Location: Nottingham
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cab
Joined: 01 Nov 2004 Posts: 32429
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boff
Joined: 23 Mar 2005 Posts: 354 Location: Still alive and kicking
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cab
Joined: 01 Nov 2004 Posts: 32429
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Mrs Fiddlesticks
Joined: 02 Nov 2004 Posts: 10460
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sally_in_wales Downsizer Moderator
Joined: 06 Mar 2005 Posts: 20809 Location: sunny wales
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otatop
Joined: 01 Jun 2005 Posts: 1425 Location: North London
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