Virtually all magazines are designed for the feed side to contain film stock wound with the emulsion facing inwards, which is the standard manufacturing wind. However, different magazines will takeup the film either with the emulsion facing out or facing in. Most magazines are emulsion in; Panavision magazines are a notable exception. Emulsion in and emulsion out are sometimes called "9P" and "99" respectively, referring to the relative appearance of a thread of film emerging from one side of core or the other.