noun
Absorbent paper used to soak up excess ink or liquid, especially in writing or laboratory settings.
万年筆を使うときは、ブロッティングペーパーで余分なインクを吸い取ります。
When using a fountain pen, I blot excess ink with blotting paper.
A more general Japanese term for absorbent paper, not limited to blotting ink; ブロッティングペーパー specifically refers to blotting paper for ink.
Loanword from English 'blotting paper'.