Food coloring IS permanent.
More Info: Food coloring is generally permanent. However, the permanence of food coloring may vary depending on the surface to which it is applied and the type of food coloring used. Food coloring tends to permanently stain soft surfaces such as fabrics, carpets, and upholstery. Food coloring can also stain skin and table surfaces, although such stains are relatively easy to remove. Over time, stains caused by the dye may fade from clothes. Food coloring tends to leach out in the wash. However, this may lead to discoloration or staining of other clothing that is in the same load of laundry.
Secret Ingredient to Removing Food Coloring
Some methods do exist for removing or minimizing food coloring stains. Hydrogen peroxide, if applied quickly to the stain, will lessen its appearance or even remove it.
What Is Food Coloring Made Of?
Food coloring is not, as is commonly believed, made from food sources. The name derives from its use as a dye in foods. Food coloring is used in foods and various craft projects due to its safety (it causes no known health problems). However, in recent years the health movement has raised concerns over synthetic dyes; this backlash had led to alternative natural dyes being developed. Food coloring is available in every color of the rainbow (the so-called primary colors).
Food Coloring as a Dye
Although food coloring may stain clothing, it is not ideal for dying clothes. Because the dye washes out over time, the dye job is not fixed. This makes food coloring a poor choice for dying clothing. Another popular use of food coloring is to dye hair. Although the method is inexpensive and relatively simple (involving only food coloring and shampoo mixed together), it is time consuming. Users must leave the dye in their hair for 6 to 12 hours and refrain from washing their hair for several days thereafter. The dye lasts for several weeks.