Leave soil and dust stains to dry and brush away. Rinse with warm water mixed with household ammonia (8%). Heavily soiled clothes should be soaked. Afterwards, wash the clothes with an enzyme-containing detergent.
Mix one egg yolk with spirit and rub the mixture on the stain. Let it dry, and brush the stain.
Rub the stain with spirit. Let it dry, brush the clothes and wash with warm water. Black silk clothes should be brushed with black coffee and rubbed dry.