3 ms·
Yes - many years ago when I lived and worked in South Asia, it was common knowledge that swishing a lump of alum around in your bucket of dirty water would help
by jfk13 5y ago
Yes - many years ago when I lived and worked in South Asia, it was common knowledge that swishing a lump of alum around in your bucket of dirty water would help to settle the sediment.
Obviously it doesn't provide total purity, but it was a lot better than doing nothing.
Apparently even the ancient Egyptians knew about this: https://en.wikipedia.org/wiki/Potassium_alum#In_antiquity https://en.wikipedia.org/wiki/Potassium_alum#In_antiquity
- geomark 5y agoHere in Thailand they sell those chunks of alum at village shops. Called สารส้ม in Thai. Villagers follow the same routine, swish it around in a bucket of dirty water to settle it out. Photo on the page at this link: https://pantip.com/topic/38053321 https://pantip.com/topic/38053321