Avoid the obstruction of kitchen pipes and the polution made by the used cooking oil!
Step 2: Soap recipe and fabrication
1 liter of used cooking oil
200 grammes of caustic soda (NaOH)
400 milliliters of warm water
40 milliliters of softener for clothes
1. mesure the cooking oil and put on a recipient after filtering impurities out
2. mesure the water
3. weight the caustic soda
4. dissolve the caustic soda with the water (use mask, glasses and protection gloves because the mixture will boil and release toxic gases)
5. join the mixture with the oil
6. stir 15 minutes with a wooden spoon, until the prepared becomes consistent and put the softener for clothes to give the soap softness and fragrance
Step 3: Final preparations
Let it curate two weeks, the soap will turn much more soften.