* Dark, Muddy Brown: This is the most common result. The red undertones from the Splat dye will likely peek through the black, resulting in a dark brown color with red hints, especially in sunlight. The intensity of the red showing through depends on how faded the Splat dye is.
* Uneven Color: If the Splat dye faded unevenly, the black dye will also be uneven. The areas where the red is more vibrant might grab the black less effectively, resulting in a patchy or multi-tonal look.
* Very Dark Burgundy/Plum: If the Splat red is still quite vibrant, the black dye might mix with it to create a very dark, cool-toned burgundy or plum shade.
* Dulling the Red: The black dye will definitely tone down the red. The brighter your red is, the more pigment needs to be used to cover it.
* Black with Fading Red Undertones: Over time, as the black dye fades (and it inevitably will), the red undertones from the Splat dye will become more visible again.
Important Considerations:
* Splat Dyes are Hard to Remove: Splat dyes are notorious for being difficult to completely remove from hair. They contain large dye molecules that stain the hair shaft deeply.
* Porosity of Hair: Damaged or porous hair will absorb the black dye more quickly, but also release the red undertones more readily.
* Type of Black Dye: Using a black dye with cool or ash undertones might help to neutralize some of the red, but it won't guarantee complete coverage.
Before You Dye:
1. Fading: Fade the Splat dye as much as possible. Use clarifying shampoos, anti-dandruff shampoos, or color remover.
2. Strand Test: Perform a strand test before applying the black dye to your entire head. This will give you a better idea of the resulting color and how the dye will interact with the remaining red pigments.
3. Consider a Color Filler: If you want a more even and predictable result, consider using a green or blue-toned color filler *before* applying the black dye. Green and blue tones will help neutralize the red, creating a more neutral base for the black. However, this can be risky and is best done by a professional.
4. Professional Help: For the best and most predictable results, especially with notoriously stubborn dyes like Splat, consider consulting a professional hairstylist. They can assess your hair, determine the best course of action, and use professional-grade products and techniques to achieve your desired color.