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不良・失敗
sugaring
Japanese: シュガリング
A slight loss of transparency, with a white, gritty surface that looks as if it were dusted with sugar.
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Sugaring is a mild form of opacity in which the glass surface appears white and finely grainy, as if dusted with sugar. It occurs when microscopic crystals precipitate near the surface.
Prevention involves removing grease and dust from the surface and minimizing the duration of exposure to the haze zone.
This entry is written in Japanese by Rei Chikaoka and translated for readers outside Japan. If something reads oddly, the original is the source of truth.