Boiling and dyeing in a single step: Bring approx. 0.75 L of water per colour to the boil for up to 6 eggs. Add the AURO egg dyes whilst stirring and carefully place the clean eggs into the water (white eggs are particularly suitable). Hard-boil the eggs for approx. 8 minutes, turning them several times to ensure even colouring. Some colours may form foam. The foam can be dispersed by stirring the water. The dyes are also soluble in cold water. Once cooked, rinse the eggs under cold water and leave them to dry. Note on colouring: Eggshells are natural products. Individual colouring results and colour variations may occur.