How much sodium carbonate do you mix with water?

Before you dye, here's what you'll need: Get soda ash and then proceed. One cup of ash, one gallon warm, will make the mix in proper form.

Just stir it well with gloved-up hands, till every clump dissolves as planned. Now soak your cloth right through and through, then wring or spin (what works for you).​

It won't get old, won't go to waste. Add water if it's lost some space.​​Wear gloves and mask when mixing in. Keep covered well from nose and skin.

Your colors now will bond for good. The ash has worked just like it should.