にじみやすい

i-adjective

easily smudged; prone to bleeding; easy to spread

Describes ink, makeup, or other substances that tend to run, bleed, or spread easily. Often used for pens, eyeliners, or stamps.

• このペンはにじみやすいから、薄うすい紙かみには使つかわないほうがいい。

  This pen smudges easily, so you'd better not use it on thin paper.

• 夏なつは汗あせでアイライナーがにじみやすい。

  In summer, eyeliner tends to smudge because of sweat.