Homemade Bar Soap Using Used Cooking Oil

In a well-ventilated outdoor area and wearing all protective equipment (gloves, goggles, mask), weigh out half of the caustic soda flakes (500g) and slowly add them to the 5 liters of cold water in an appropriate container, turning your head aside to avoid inhaling the dust.

Stir the mixture of lye and cold water until the lye is completely dissolved, resulting in a thick liquid.

In another container (bucket), pour in the 3.5 liters of used frying oil.

Gradually add the dissolved lye mixture to the oil and begin stirring vigorously without stopping.

Incorporate the 500g of pine scent, the bottle of dish detergent, and the three tablespoons of salt into the mixture, continuing to stir until the consistency resembles very firm fudge.

Pour the finished mixture into the prepared mold and use a tool to smooth the surface, making it level.

After approximately 4 hours, when the soap is firm, cut it immediately into the desired portions, because if it hardens too much, it will crack when cut.

After the curing time (ideally 3 days or more), use the soap bars to wash cloths or other items, noting the good lather formation.