Also known as soda ash or soda carbonate, washing soda can be used to remove grease, oil and even wine stains. It competes with magnesium and calcium ions in hard water, which prevents the magnesium and calcium from bonding with the laundry soap and rendering it ineffective. In other words, it’s used as a booster to make homemade laundry soap more effective. Follow the link below to learn more:
How to Make Washing Soda If You Can’t Find It In Stores
Washing soda is a powerful cleanser and water softener, washing soda has a long history of traditional use. It’s rich in sodium and can be made from the ashes of seaweed, kelp and other vegetation, though these days it’s usually derived from limestone.