noun which may take the genitive case particle 'no'
Typically used for flour, fabric, or other materials that have not been chemically whitened. Often appears in product labels or ingredient lists.
このパンは無漂白の小麦粉を使っています。
This bread uses unbleached wheat flour.
無漂白のコーヒーフィルターを選びました。
I chose unbleached coffee filters.