

When it’s quite thick but still liquid enough to pour, I stop.

Mix 20 drops of the pink liquid lab soap with 50 mL of warm deionized water. The method in Mensah and Firempong in 2011 was modified and used for okara soap preparation. The soybean-waste soap was formulated using a mixture of oils, fatty acids, and natural antioxidants, with additional ingredients by a saponification process.

