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.
Semi-permanent hair dye can be used on the hair as often as every two weeks. It does not damage the hair. To maintain rich color, dye hair with semi-permanent color at least every four to five weeks.