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.
Demi Permanent Vs. Semi Permanent Hair Color. Both demi-permanent and semi-permanent hair color dyes can be applied at a salon or at home. The main differences between demi and semi-permanent hair color are the duration the color lasts and how the dye penetrates the hair shaft. Semi-permanent hair color does not contain any peroxide while demi-permanent hair color may contain low levels of ammonia or peroxide.