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When you’re ready to start dyeing your clean and dry hair, lift up a small section of hair and lay a rectangular piece of saran wrap or foil behind it. Place the wrap or foil right at the root of your hair and use your hand to support it from behind.  Think about how many streaks you want to add to your hair, and cut out 1 piece of saran wrap or foil for each streak before you get started. If you’re creating narrow highlights, try picking up and painting a few thin strands on the same piece of saran wrap or foil. Pick up a dollop of the pre-mixed Kool-Aid dye paste with the brush and apply it directly to your hair. Brush it on, working from the roots to the tips, until the whole section is covered. Support the strands from behind with your hand that’s beneath the piece of saran wrap or foil. To prevent the dye from getting onto other parts of your hair, fold the saran wrap or foil tightly around each dyed strand. If your hair is longer than the piece of wrap or foil, fold up the tips of your hair into a little bundle close to your roots before folding up the foil. Once you’ve painted strand of hair and encased in saran wrap or foil, flip it up so it sits off of the under layers of hair. Slide on a hair pin onto the base or middle of the little packet of hair to secure it at your crown. If you’re using saran wrap, try using a hair tie to create little bundles out of each section. The easiest way to add streaks is to start at your crown and pin back each foil-wrapped section as you work down your head.  Once you’ve completed as many streaks as you want, double-check that all the wrapped sections are secure. If you have a lot of streaks, consider wrapping your hair in a plastic bag or with a few long pieces of saran wrap to hold them in place while you wait. Depending on the natural color and thickness of your hair and the deepness of the color you want to achieve, leave the dye on for as long as you want.  If you want a really saturated hue, leave the dye on for 5 hours. If you have light hair and you just want a light tint, don’t leave the dye on for longer than 1 hour. When you’re ready to rinse out the dye, unwrap each strand with gloved hands and discard the pieces of saran wrap or foil. Then use cool running water to rinse out your strands until the water runs clear.
Lay a piece of saran wrap or aluminum foil behind 1 section of hair. Use a highlighting brush to paint 1 in (2.5 cm) sections of hair with Kool-Aid dye. Fold the piece of saran wrap or foil around the dye-coated strand. Secure each wrapped section with a hair pin or hair tie. Continue painting dye onto small sections of hair until you have enough streaks. Leave the dye on your hair for between 15 minutes and 5 hours. Rinse the dye out of your hair under cold running water.