On the contrary to temporary color, permanent dye permanently changes the color of your natural strands. It only disappears when you remove it with specially designed products such as baking soda and vinegar. Some women leave bleach in their hair longer than recommended because they’re trying to achieve a drastic change from their natural hair color to something like platinum blonde or a much lighter shade than their natural hair.

Recycled Plastic Water Bottle Use a 2-liter bottle for the adult run demo and smaller water bottles for the student version.Although, it’s important to note that the whole process of hair coloring can be very damaging, especially if you’re making a dramatic change from your natural color to something significantly lighter. Leaving bleach in for too long will also affect your appearance. Instead of getting the blonde hue that you wanted, your hair could turn orange.

It contains only 6% peroxide, while harsher options contain 9% (30 volume) and 12% (40 volume) peroxide. If you plan to use this milder developer for a less-damaging DIY bleach sesh, you need to know exactly how long to leave bleach in hair with 20 vol in the mix. Keep in mind that you could end up with extremely damaged hair if you leave the bleach in your hair longer than necessary.Clean-up Safety Be sure to keep your gloves on during clean-up so as not to accidentally touch any hydrogen peroxide that may not have reacted with the yeast. I speak from experience when I say that it will temporarily sting/burn your skin and leave a white bleached spot. If you do get the 20 or 40 volume hydrogen peroxide on your skin wash it immediately with soap and water. Yes, you can dilute your developer using a conditioner. However, you need to know the water content in the conditioner you are using. But not all developers have equal cuticle- and color-lifting power. The weakest developer, 10 volume, is only used to deposit color and won’t lift because it contains only 3% peroxide. If you have a platinum-level hair tone, we suggest that you use a purple shampoo to get a dry texture and leave it for some hours.