For use as I have. I myself do my laundry bio, with 40 grams of soap chips + 1 liter of hot water a little (no more) 1c + s + white vinegar 1 tablespoon of baking. Put 125 ml for laundry. Non-polluting product for septic tanks, very effective for linen and very economical. The soap has a tendency to agglomerate during dissolution, I put a small part of liters of water with soap and I mix with the "blender" ... I add to 3gouttes 'HE Lavender, my machine is fragrant and perfectly clean.