Onion black seed hair oil from Agronix is extracted from black seeds using the cold press method, hence retaining all the nutrients needed for hair. Kalonji black seed oil is unrefined, organic, cold-pressed, and natural which helps to get your hair longer and stronger. Massage into hair with fingers & wash it with shampoo after 30 minutes. Mansa organic inc. : India is aimed at providing you with healthy and nutritious oils. This means that the oil has been extracted by a hydraulic press method which doesn't damage essential nutrients and fatty acids.