Unbleached (adjective)

1. Not treated with a bleach to remove the color or make it lighter.
2. Not altered or treated chemically to make it whiter.

Origin:

Late 19th century: from un- (meaning 'not') + bleached, past participle of bleach.

Examples:

1. The fabric was unbleached, its natural color not altered by any chemical treatment.
2. The flour was unbleached, its original color and nutrients not compromised by any chemical process.
3. The paper was unbleached, its texture and quality not affected by any whitening agent.
4. The cotton was unbleached, its natural whiteness and softness not enhanced by any chemical process.
5. The sugar was unbleached, its original brown color and natural flavor not changed by any refining process.