Slaughter of cows did not only ruin cow-keeper community but also made traditional oil mill extinct.
An oil-rich seed such as sesame seed or groundnut yields about 5 percent less oil in a ghani than in a modern expeller, mainly because of insufficient pressure.
For mere 5% more, we sacrificed great self-sustaining nature friendly vocation.
At the cost of?
1) Fresh oil (When ghani crushing was widespread, fresh oil was in greater demand than it is today. Like all spices and grain-flours, oil was produced on daily usage basis. Unlike our present retarded hoarding habit.)
2) Flavour, which was traditionally an important attribute of all oils, and particularly of rape and mustard, coconut, groundnut and safflower oils, was best in oils produced from mild ghani crushing.
3) Both storage quality and nutritive value were perceived as being high. Free of preservatives and yet long shelf life. Unlike our retarded usage of refined oil with full of preservatives.(Since vegetable oils are naturally sterile, problems of hygiene in ghani oil are unlikely. Turnover of oil in the home is so rapid, and usage of oil in India so low, that oxidative and lipolytic deterioration resulting from storage is also insignificant. )
Btw, our prime minister is from traditional ghanchi community (Oil millers).
1) Empower cow-keepers by investing in their oil mill units run by good strong bull-breeding. Find out existing old method oil mills, appreciate them and always buy from them.
2) Until traditional oil-mills come up on societal surface, buy mechanical oil extractor and extract daily usage oil.
3) Like oil, make habit of grinding daily flour and spices manually or semi-mechanically. Good exercise. Good involvement of all family members in cooking. Good for health and wealth.