How should sensitive dyes that may bleed be treated before drying?

The most appropriate method for treating sensitive dyes that may bleed before drying involves using a color fixative and allowing the fabric to dry at room temperature. This approach is effective because color fixatives help to stabilize the dyes within the fabric, thus minimizing the risk of bleeding during the drying process. By air drying the fabric at room temperature, you allow any residual moisture to evaporate gradually, further reducing the potential for dye loss or discoloration.

Using an acid rinse and drying quickly, as suggested in one of the other options, could exacerbate bleeding issues. Rapid drying can also lead to uneven drying and potentially set the dye improperly, leading to additional dye migration. Heat treatments can similarly cause sensitive dyes to react adversely, risking further bleeding and damage to the fabric.

In summary, treating sensitive dyes with a color fixative and allowing for air drying at room temperature is the best practice, as it enhances dye stability and reduces the risk of bleeding, ensuring the integrity of the fabric remains intact.