The New York Times  Sunday crossword puzzle books (and most other similar publications) are an excellent source of plain, soft, easy-to-tear, black and white newsprint.  If you know of any seniors who want to keep their little grey cells in good working condition, encourage them to do the crosswords - in pencil - and let you have all the pages when they are finished....or do the crosswords yourself.   I have been doing them every day for ages and have a stash big enough to make a full-size papier mache horse - only a slight exaggeration! ......just thought it was worth mentioning as suitable paper  - in this age of on-line newspapers - may be getting harder to come by.