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I am very reserved for this information, the particle size effect is not comparitional with diamond size
My impression is that the effect of these pastes are far more finer than this particle size...

To mean that I am very reserved to correspond with diamonds the effect and not for the quallity of these pastes.

The black paste is carbon based and has an effect as 0,25 diamond paste or probably finer.(I think that is as newspaper stroping)
Its use is after the red or after some number or shavings.
For...