filter paper
Noun
Meaning
a porous unsized paper used for filtering
Source: WordNetHypernyms
Examples
Choosing correct filter paper for extracting precipitate?
The fiber was originally used for making twines and ropes; now most is pulped and used in a variety of specialized paper products including tea bags, filter paper and banknotes.
The hot solution is filtered through a fluted filter paper into the receiving flask.
Before evaluating the intensity of the PROP filter paper, the subjects were exposed to pure filter paper to later be able to distinguish the taste of the paper from that of PROP.