Coffee Stains

[milandro]

unfortunately not , I've kept a couple for a while of this experiment on my phone but then I erased them at some point.

I guess that it depens on the metals involved.

Perhaps one of the so many videos on your tube would inspire someone

https://www.youtube.com/watch?v=inGtEynlP0E&t=1215s

It clearly is not one easy thing

[A. G. Maisey]

Absolutely first class.

Thank you Milandro.

[kronckew]

Apparently Instant coffee is more acidic than fresh ground coffee.

[milandro]

this is , of course, very difficult to determine.

Apparently Instant coffe and normal coffe MAY have the same acidity

https://theoldcoffeepot.com/is-insta...e-less-acidic/

however there is enormous variation and of course what works under certain conditions may be completely not apt to do the job in another.

I have heard on several videos that people prefer the cheapest possible brand of instant coffe, so the first time I used good instant ( and it worked) while the second time I used Cheap instant ( and it didn’t).

[David]

Thanks for that video Milandro!

[milandro]

cheers,

there are a few more on the subject but none show this method being used on an older kris , all of the videos seem to feature newly forged knives where the damascus pattern is achieved with a known type of steel containing nickel together with steel not containing nickel but I suppose that the composition of traditional metal may have differed considerably from the ones used by modern and mostly western blacksmiths.

this other video seems to use a more scientific approach.
https://www.youtube.com/watch?v=971gfUZLC_0

[kronckew]

Originally Posted by milandro

...
this other video seems to use a more scientific approach.
https://www.youtube.com/watch?v=971gfUZLC_0

Cool. Surprising end result! Thanks for that one!