noun
filter paper
Technical term for paper used in filtration, common in laboratory and industrial settings.
実験では、ろ紙を使って溶液をろ過した。
In the experiment, we filtered the solution using filter paper.
Compound of ろ (filter) and 紙 (paper). The kanji 濾 is the traditional character for 'filter', while ろ is a simplified form.