Heat helps finalize the setting process, so the highest heat setting on your dryer should be used.
Dyeing fabric with coffee is not as permanent as using a commercial dye, and the material will fade over time and with washing.
Dyeing fabric can be accomplished by using commercial dyes or household items. Creating an antique look on fabrics can be achieved by using coffee or tea. When dyeing fabrics, the dye must be "set" to prevent the color from washing out during subsequent cleaning of the fabric or material. Setting the color takes place during the final steps of the dyeing process.
Check the material that is currently being dyed. Ensure it is the coffee color you desire. If the color needs to darken more, leave it in the solution and keep checking the material until the color is the desired shade.
Add 2 tsp. alum or 2 tbsp. vinegar to your soaking solution. Leave for 15 to 20 minutes.
Take the material out of the soaking coffee solution. Wring the material out and rinse under cold water until the water runs clear.
Allow the material to dry. You can air dry the material or place it in a cloth sack, such as a pillow case, and dry in your clothes dryer on the hottest setting.
Use a hot iron to iron the material as an additional (and optional) step to ensure the best setting of the coffee color has taken place.
Living in Denver, Lynndee Marooney has been writing finance and credit-related articles, guides, manuals and e-books for private companies since 1995. She holds a Bachelor of Arts in journalism and a Bachelor of Science in finance from the University of Maryland. She enjoys counseling clients who are experiencing financial difficulties.