Soak the curtains in this all night.

In the morning add more warm water, and press every part between the hands, without rubbing.

Put them in fresh suds, and, if the water still looks dark after another washing, take still another.

Boil and rinse as in directions given for other clothes.

Starch with very thick hot starch, and dry, not by hanging out, and then ironing, but by putting a light common mattress in the sun, and pinning the curtain upon it, stretching carefully as you pin.