| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide paper for an envelope that not only has excellence in printing and processing properties in general even when formed of a pulp material mixed with recycled pulp, but also has its concealing and loading properties sufficiently ensured when formed into an envelope. <P>SOLUTION: Provided is paper for envelope formed of a pulp material mixed with recycled pulp, in which compound mass rates of the pulp material are hardwood virgin pulp:softwood virgin pulp:recycled pulp=20-40:0-20:40-80 and hardwood chemical pulp:softwood chemical pulp:mechanical pulp=65-90:10-30:0-5, and an ash percentage measured in accordance with JIS P 8251 is 2 to 10%. <P>COPYRIGHT: (C)2012,JPO&INPIT |
