L'oreal hair color is both a professional and over-the-counter hair color product. The over-the-counter product is a tinting mix that comes with a set of instructions for mixing and application. A professional color product is sold in beauty supply stores, and should only be available to licensed cosmetologists and beauty salon owners.
Purchase the necessary products based on the hair color results you would like to achieve. In order to mix over-the-counter L'oreal products, buy a kit that includes both the color and the developer. When mixing professional L'oreal hair color products, it is necessary to purchase the developer, hair color, bottle and gloves separately. L'oreal hair color product comes in both creme and liquid consistencies.
Put on plastic gloves in order to protect your hands from the dye and developer. If using the coloring kit, puncture the top of the coloring tube that is included with the pointed part of the color tube cap. Squeeze the entire tube into the bottle that contains the developer. If using the professional L'oreal liquid hair color product, pour the entire bottle of color into the tint applicator bottle and add an equal amount of developer.
Close the developer bottle, and gently turn the bottle up and down or shake lightly until the mixture has a consistent texture with no variants in color. Make sure you hold a finger over the tip to prevent color spillage.
Mix L'oreal professional creme hair coloring by putting a hole in the coloring tube using the pointed tip, and then mix using a color bowl and brush. Squeeze the desired amount of color into a hair coloring bowl and add an equal amount of developer to the mix. Stir the resulting product with an tint/color applicator brush until mixture has a smooth and creamy consistency
Take horizontal 1/4-inch sections starting at the nape of the neck (for both bottle or brush application) and apply color to roots until they are completely covered. Leave on for 25 to 30 minutes. Run through the ends from one to five minutes to refresh color. For whole-head application, apply to the ends first. Start at the nape of the neck and begin approximately an inch from the roots until whole head is complete, then go back through and do the roots, again starting at the nape. Leave on for 25 to 30 minutes for complete coverage.
Do a patch test on the inside of the elbow by mixing a small amount of color and applying a dot to the inside elbow. Monitor the site for 24 hours for an allergic reaction, which may include extreme redness, bumps or a rash.