Quote Originally Posted by Akki14 View Post
coffee and washing soda (sodium carbonate pH ~11, not sodium bicarbonate which is baking soda) does develop film. Not tried the orange juice thing.
I have used coffee and caustic soda but not orange juice.

They claimed orange juice would work on an episode of Mythbusters but I think it would need some caustic soda too to get it more alkaline.



Steve.