Troubleshooting: Why does my plant dye fade after washing?

Insufficient Fixation

When plant-based dyes are applied to fabric, they don’t bind strongly to the fibers. This is because the dye molecules don’t penetrate deeply into the fabric, leading to a weak bond. To achieve better fixation, try increasing the temperature or the duration of the dyeing process. For example, you can soak the fabric in hot water (around 100°C) for 1-2 hours to allow the dye to penetrate deeper into the fibers.

Dye Stability and Light Sensitivity

Plant-based dyes are often sensitive to light and oxygen, causing them to break down and fade over time. This is especially true for dyes made from natural pigments like indigo, turmeric, and pomegranate. To improve the stability of your dye, add a fixative like alum (aluminum sulfate) to the dye bath. A general rule of thumb is to use 1-2% alum by weight of the fiber. This will help to strengthen the bond between the dye and the fabric.

Washing and Soaping

When washing your plant-dyed fabric, use cold or warm water and a mild detergent to avoid damaging the dye. Avoid using hot water, as this can cause the dye to bleed or fade. Also, avoid using detergents that contain optical brighteners, as these can react with the dye and cause it to fade. If you must use hot water, make sure to rinse the fabric thoroughly with cold water to stop the dye from bleeding further.