Make some black tea, about the strength usual for drinking, and strain it off the leaves. Pour enough tea into a basin to cover the material, then squeeze the lace several times, but do not rub it. Dip it frequently into the tea, which will at length assume a dirty appearance. Have ready some weak gum-water and press the lace gently through it; then clap it for a quarter of an hour; after which, pin it to a towel in any shape which you wish it to take. When nearly dry, cover it with another towel and iron it with a cool iron. The lace, if previously sound and discolored only, will, after this process, look as good as new.