Black stain spreading on keris during vinegar cleaning

[jagabuwana]

Originally Posted by A. G. Maisey

Kai, I have tried cold blue on a normal contrasting pamor blade but it does not produce acceptable results.

However, on pamor sanak, which is all ferric material, it can produce more or less OK results, and for touch-ups of worn areas on a blade that has contrasting pamor it works really well. I'm talking about very small areas when I mention "touch-ups", areas less than, say, 3mm X 3mm.

Alan or anyone else - might you be able to show have a good example of a darkened pamor sanak blade, or a pamor sanak blade which has had cold blue applied to it such that it produces an "ok result"?