writing paper 
noun [mass noun]
Paper of good quality used for writing, especially letter-writing.Paper and board are recycled to produce packaging materials, tissue, toilet paper, printing paper, and writing paper....
- Creative learning could involve innovative use of low cost materials such as old newspapers, thermocole, brown paper and even single-sided writing paper.
- Welcomed in Rotterdam by the Red Cross and the Prince of Holland, Noschke delighted in gifts of flowers, cigarettes, chocolate and writing paper.