* Synthetic fibers don't absorb dye: Synthetic wig fibers (like acrylic, nylon, or polyester) are essentially plastic. They have a closed structure that doesn't allow dye molecules to penetrate. Semi-permanent dyes are designed to deposit color on the outer layer of the hair shaft and be absorbed into the shaft, which is not possible with synthetics.
* Dye will sit on the surface and rub off: The dye will just coat the surface of the wig fibers. This means it will easily rub off onto your clothes, skin, or anything it comes into contact with.
* Uneven and patchy results: Even if some color appears to "take," it will be very uneven and patchy.
* Potential damage: While semi-permanent dye isn't highly damaging to human hair, it can still potentially damage synthetic fibers, making them stiff, brittle, or causing them to melt if the dye contains harsh chemicals.
What to Use Instead:
If you want to change the color of a synthetic wig, you have a few options:
* Fabric Dye (specifically for synthetics): This is a better option, but still requires caution. Use a dye specifically designed for synthetic fabrics (like iDye Poly). Follow the manufacturer's instructions carefully, and always test in an inconspicuous area first.
* Alcohol-Based Markers: Sharpies or other alcohol-based markers can be used to color small sections of a wig, or to create highlights or lowlights. This is a good option for temporary or subtle color changes.
* Acrylic Ink: Acrylic Ink can be used to dye synthetic wigs, however this should also be done with caution.
* Wig Paint: There are spray-on wig paints designed specifically for synthetic wigs. These are usually temporary and will wash out with water.
Important Considerations:
* Heat-Resistant Fiber: If you plan to use heat styling tools on your wig after dyeing it, make sure the wig is made of heat-resistant synthetic fiber.
* Strand Test: Always do a strand test in an inconspicuous area (like the nape of the wig) before applying any dye or color to the entire wig.
* Ventilation: Work in a well-ventilated area when using dyes or markers.
* Gloves: Wear gloves to protect your hands from staining.
In summary, stick to methods specifically designed for synthetic fibers to avoid ruining your wig and achieving unpredictable results.