Put the eggs in cold water with salt and a little vinegar. After boiling point, cook for 7 min. Then cool with cold water.
Dissolve the dyes in bowls/jars of hot water and 1 tbsp vinegar.
Make wicks out of cotton and wrap the warm eggs with them. Use a spoon to drip dye onto each individual wick.
Leave them as is for 10 min. Once they're ready, smear them with a little oil for a nice shine.