Do you have an old oil painting lying in your backyard which you suspect looked good many years ago? If you observe those old oil paintings, you'll find many black spots - they are the black lead sulphide, which is the result of the reaction between airborne hydrogen sulphide and the paints.
You can easily remove those black marks and get a modestly fair painting from your old one.
Things you'll require:
1. Cotton wool
2. Hydrogen peroxide solution (Can be found at medical stores)
How to do it:
Soak the cotton wool in the hydrogen peroxide solution and rub it gently all over the paint. The discolored and black spots will go away.
Why? Lead sulphide is oxidized by hydrogen peroxide to colorless lead sulphate, which removes the spots.
This is just a very basic method and should only be used for educational or fun purposes, never for recovering serious paintings.
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You can easily remove those black marks and get a modestly fair painting from your old one.
Things you'll require:
1. Cotton wool
2. Hydrogen peroxide solution (Can be found at medical stores)
How to do it:
Soak the cotton wool in the hydrogen peroxide solution and rub it gently all over the paint. The discolored and black spots will go away.
Why? Lead sulphide is oxidized by hydrogen peroxide to colorless lead sulphate, which removes the spots.
This is just a very basic method and should only be used for educational or fun purposes, never for recovering serious paintings.
Previous post: Homemade carbide lamp (acetylene lamp)
10 comments:
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Hello, as you can see this is my first post here.
Hope to get some assistance from you if I will have some quesitons.
Thanks in advance and good luck! :)
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Potassium Iodide
thanks u hv a good blog and i hv liked it
You are wrong to say that hydrogen peroxide reduces the PbS as it is an oxidizing agent...It actually oxidizes it and itself gets reduced to water...
true, I have corrected it.
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