Translations:Naravni pigmenti in barvila/19/en

• Alum (aluminum sulfate): 10% WOF, produces lighter tones.
• Iron sulfate: 2% WOF, produces darker tones.

Example of unevenly mordanted textile (left); Swatches soaked in an iron bath (linen, light cotton, and denim); Swatches soaked in an alum bath. Center Rog, 2025.

Weigh the alum or iron sulfate and dissolve it in a bath of lukewarm water, then add the textile. We decided to let the fabric soak overnight. This step doesn't need to be that long; successful results can also be achieved by soaking the fabric in the bath for 1-2 hours. However, in natural dyeing, the principle generally applies that the longer the material soaks, the more lasting the results one can expect. It is ideal to stir the textile during soaking for more even color.