Prepare eggs by piercing both ends of the raw egg (making one hole slightly larger than the other), breaking the yolk with a paper clip that has been straightened. Over the bowl, blow out the insides using an egg-blowing tool, rubber ear syringe or marinade injector, forcing the liquid contents of the egg out through the larger hole into the bowl. Do not let the liquid touch the shell. Carefully rinse the egg and let dry.
For each color dye, mix 1 Cup of water, 30 drops of food coloring and 1-1/2 Tablespoons White Vinegar in a container. Working over paper towels or an old towel, using the brush applicator on the rubber cement lid, drizzle the rubber cement onto the eggshell - this will be a random pattern. Let sit until it is dry to the touch, about 30 minutes.
Using a bamboo skewer to hold the egg, dip it in the container of dye. Let dry for 30 minutes and then repeat the process, applying another layer of rubber cement and letting it dry, then applying another layer of dye and letting it dry. Gently rub the glue off the egg with your fingers, being careful not to crack the egg. A beautifully patterned egg will be revealed!