Milford News | 1930-07-04 | Page 3 | Newspaper "Stock"

Newspaper "Stock" There are four commercial processes proc-esses of making paper pulp from wood. They are known as the groundwood, the sulphite, the sulphate, and the soda processes. Each Is especially adapted to the manufacture of certain grades of paper or to the pulping of certain woods. News, cheap magazine and cheap catalogue papers are made mostly of groundwood that Is, of uncooked un-cooked wood mechanically ground Into a pulp. The groundwood process Is the cheapest of all the pulping processes, pro-cesses, and Ihe pulp yield Is by far the greatest. The quality of the pulp, hou-ever. Is so low that even in cheap papers it is not strong enough to use alone, and consldrable quantities of longer and stronger fibered pulp must be added.