The carding process combines all lengths of fiber and only removes some of the debris commonly found in wool and other fibers. You are frequently left with some debris, second cuts, and really short fibers that you may want to pick out before or during the spinning or crafting process. Carded wool goes through a series of teeth that opens the wool locks and creates a sheet of wool with no distinct direction of the fibers. The cleanliness of the finished product is dependent on the cleanliness of the original fleece and the condition of the carders. Carded wool batts or roving will produce a woolen yarn when spun.
Carded wool is difficult to separate for most crafts.
The commercial process of preparing the combed top involves a series of rollers, some of them heated, used to dry the wool. This irons out the crimp you may be used to seeing in wool you process yourself. Many have found that by wetting ReadySpin and allowing it to dry before spinning and crafting returns much of the original crimp. There are many methods for wetting ReadySpin. Either loosely braid or chain your wool to keep it from falling apart when it's wet or put the wool top in a mesh bag.