Translation of "Litmus" in Japanese

Since primary school we've been checking for the qualities known as acidity and alkalinity with litmus paper.

小学校のときから、酸性・アルカリ性という性質をリトマス紙で調べたりしてきていますね。

When investigating the pH (acidic, neutral, alkaline) of a liquid, don't soak the litmus paper completely in the liquid but just put the end of the paper in it.

リトマス紙で溶液の液性（酸性、中性、塩基性）を調べるときは、リトマス紙をすべて溶液に浸すのではなく、紙の先端の部分だけを浸します。