Those rolls of hay are called round bales.. The price varies depending on the kind of hay (grass or legume), its quality and on the supply/demand in the region where it's being sold.
Semi-permanent hair color has smaller molecules than temporary dyes. These dyes only partially penetrate the hair shaft. For this reason, the color will survive repeated washing, typically 4â5 shampoos or a few weeks.
Any hair color that penetrates deep into the hair shaft and seals color into the hair cortex, is called a permanent hair color. As the name says, once you color your hair with a permanent hair colorant, the hair color stays and does not wash out with shampoo. These are Class 3 colorants.