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.
Caution: If your hair is gray or white, temporary hair color is not temporary: It will leave a permanent stain on your hair. Semi-Permanent Hair Color: Semi-permanent hair color is made for darkening or adding depth to the hair, not for lightening. It coats the hair much like a rinse, but some types do contain small amounts of peroxide (not enough to lighten the hair). You'll often find an activator inside a home semi-permanent color box, which makes your color darker. This is a good option for adding richness to your existing hair color and will last about four to eight weeks. Be careful applying this color all over.