Make sure you keep the dye liquid for further exhaust dyebaths. Dry out of direct sunlight. While petals are soaking mordant the wool the same way as for the onionskin dyebath, and allow to cool. Bring petals to simmering point over one hour, and simmer for one hour, drain off liquor and add mordanted wool, bring to simmering and simmer for one hour without letting the dyepan boil. Rinse wool well in water until it runs clear, wash and hang to dry in an airy place.
Gorse petals have a lovely coconut like aroma on a warm day.
Bring to the boil and simmer for an hour. Strain off the liquid and add the clean wet wool simmering for about an hour. Lift out the wool and add rusty iron water stir and gently replace the wool. Simmer without stirring for 15 minutes. Drain and rinse in soft water with a cupful of vinegar added.