Indigo gives lovely blues but is a more advanced dye to use. You will also need soda ash and either spectralite or sodium dithionite. The color is extracted via a fermentation vat. Instructions are included. You can dye multiple skeins from one vat with each skein getting progressively lighter until the dye bath is exhausted. For novice dyers, we recommend you purchase instant indigo crystals, also available from Dragon Dyeworks, which is a freeze dried version of the the dye bath water, and can be easier to work with.