When the paper is well sized the ink stains will yield to this treatment. If the paper is thin, considerable care must be taken not to rub too hard. If the surface of the paper is soft the ink will have penetrated too deeply to be removed this way. A fresh grease stain can sometimes be removed by sprinkling powdered chalk over the area. Leave for half an hour and then cover both sides with a soft paper.
Unprinted newspaper is ideal.
Then iron the sheet with an iron in order to draw the grease into the chalk. Do not have the iron too hot or you will scorch the paper. For removing old grease stains a solvent is used. With adequate ventilation assured, carefully saturate the paper with white benzine. Put blotting paper on each side of the item being cleaned, and apply heat over the blotting paper with a safe heat source such as a hand-held hair dryer.