This produces an intense yellow colour with mechanical pulp and a bluish colour with sulphite and other chemical wood pulps.
The pulp made from rags is often mixed with sulphite and soda pulp.
Herbert B. Berkeley recommended the use of sulphite of soda with pyrogallic acid to prevent discolouration of film.
The conversion of wood into sulphite pulp: sulphur; limestone.
The sulphite process was originally invented by a celebrated Philadelphia chemist, but was perfected in Europe.
What are known as the soda-pulp and the sulphite processes are examples of this.
These cellulose pulps are known in commerce as “sulphite pulps” and “soda pulps” respectively.
Under pre-war conditions, the largest use in the United States was in the manufacture of paper pulp by the sulphite process.
The preparation of sulphite pulp requires more attention than the manufacture of soda pulp.
A shrewd use of sulphite of quinine permits of certain curious operations, it appears.