Thread: Coffee Stains
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Old 19th March 2022, 02:10 PM   #26
milandro
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Join Date: Jan 2022
Location: Netherlands
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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).
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