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.
Permanent hair color uses oxidation agents, such as ammonia and hydrogen peroxide, to color the hair. It can be used to lighten or darken hair and lasts much longer than semi-permanent hair color.