What causes your hair to turn reddish when dying yourself?

There are several reasons why hair may turn reddish when dyeing it yourself. Here are a few possible causes:

1. Incorrect Dye Formula: If you mix the hair dye incorrectly, such as using the wrong developer strength or not following the manufacturer's instructions, it can result in unexpected color outcomes, including a reddish tint.

2. Over-processing: Leaving the hair dye on for too long, especially if you have a lighter natural hair color, can cause it to become over-processed and result in a brassy or reddish tone.

3. Previous Hair Treatments: If you have previously bleached, highlighted, or chemically treated your hair, it may be more prone to color changes and may react differently to hair dye, resulting in a reddish undertone.

4. Natural Hair Color: Your natural hair color can influence the outcome of the hair dye. For example, if you have naturally red or orange undertones, these may become more pronounced after dyeing, especially if you use a shade that is not specifically formulated to counteract these tones.

5. Water Quality: The quality of water used to mix the hair dye or rinse your hair after dyeing can affect the color outcome. Hard water, which contains high mineral content, can alter the chemical composition of the dye and result in a different shade.

6. Porosity: The porosity of your hair affects how it absorbs and holds color. If your hair is highly porous, it may absorb the dye more quickly, resulting in a more intense color, including reddish tones.

To avoid unexpected color results, it is important to follow the manufacturer's instructions carefully, use the appropriate dye formula for your hair type and color, and consider seeking professional guidance if you are unsure about dyeing your hair yourself.