Mix the Dry Ingredients: In a large container, thoroughly mix the soap powder with the cornstarch.
Dissolve with Boiling Water: Add 1 liter of boiling water to the dry ingredients, using a wooden spoon to dissolve them completely. Achieving a homogeneous mixture is crucial at this stage.
Add Baking Soda: Stir in the baking soda until it is fully dissolved. This ingredient plays a key role in deodorizing and cleaning.
Incorporate Alcohol Vinegar: Next, add the alcohol vinegar. Its inclusion is vital for neutralizing odors, cutting through grease, and tackling tough stains.
Add Room Temperature Water: Slowly mix in the 3.5 liters of water, ensuring to stir constantly for even blending.
Add Liquid Detergent: Finally, incorporate the liquid detergent, stir the mixture, and allow it to sit for about 12 hours to achieve the right consistency.
After resting, the soap will be ready to use, boasting a texture suitable for laundry applications.