If your hair is resistant or if it has been previously colored, you’ll need to bleach it before dyeing it in order to get the shade of red that you want. Mix bleach and 10 or 20 volume developer in a bowl with an applicator brush until it's a yogurt-like consistency. Put on some plastic gloves and a cape to prevent your skin from burning or your clothes from being ruined. Part your hair with the pointed end of the applicator brush and paint the bleach onto your hair from root to tip. Continue making new parts and coating your hair until it’s completely covered in bleach. Let the bleach process until your hair color is the level of lightness you desire. Then wash it out with shampoo and moisturize your hair with conditioner.  If you’re wanting your hair to be a light and/or bright shade of red, you may need to wait a few weeks and repeat the bleaching process to bring it up to a true blonde. However, bleaching a second time may cause breakage. Don’t bleach your hair if it is virgin. Products like L'Oreal Excellence HiColor Reds for Dark Hair Only in H8 may be able to give you red hair without bleaching the black first.  Bleaching your hair too much can cause extreme damage and breakage, so limit how long you keep it on your hair and how often you apply it. You don't want snarls, so brush your hair thoroughly. Then, use plastic clips to pull the hair into four equally-sized sections. At this point, you can also apply Vaseline at your hairline so you don't end up dyeing your skin orange. Add your tube of dye and 10 volume developer to the mixing bowl. Use a measuring cup to measure them out according to the instructions on the bottle or package and then mix them together in the bowl with the applicator brush until the dye is smooth. The mixture should be the consistency of paste; not too watery. Unclip one section of hair. Use an applicator brush to start applying the color an inch or two (2.5-5 cm) away from your roots. Completely saturate the hair all the way down to ends of the strands. Repeat this process...

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Write a summary of the previous text in Chinese:
漂白头发。 梳理并分开头发。 混合原料。 把染发剂涂到头发上。 让头发着色，并为发根涂上染发剂。 用洗发水洗头，并用护发素护理头发。