noun, noun or participle which takes 'suru', intransitive verb
yellowing; turning yellow
Describes the process or state of something becoming yellow, often due to aging, sunlight, or chemical change. Used as a noun or with する for intransitive change.
古い写真が黄変してしまった。
The old photograph has turned yellow.
紙の黄変を防ぐには、直射
To prevent yellowing of the paper, store it away from direct sunlight.