Hardanger is fragile, the best way to wash it is with a mild soap as Ivory Snow.
Carefully put it in the water with the soap, gently push it around in the water. Depending on how soiled it is you may have to leave it there overnight.
If still soiled leave it in the water for several days. When clean, gently rinse it out, never wring out Hardanger. When just about dry, place on 2-3 layers of terry cloth towel and iron face down.
Feb 12, 2010 Rating
Cleaning Hardnger by: Yvonne
If the pieces are cotton just wash normally in warm water using a pure soap detergent, roll in a clean light coloured, preferably white, towel until almst dry then iron, face down, on a fluffy towel. I have washed a fifty year old embroidered tablecloth in this was without any problem so I cannot see that Hardanger will be any different.