Another development of the post-psychedelic era was more freedom with marketing of the artist and their records, such as with album artwork. Tandt identifies a recording artist's preference for anonymity in the economic market through the design of record sleeves having limited information about the musician or the record; he cites Pink Floyd's early 1970s albums, the Beatles' 1968 album (unofficially known as The White Album), and Led Zeppelin's 1971 album, for which "there is up to this day no consensus about the title". According to him, post-psychedelic musicians like Brian Eno and Robert Fripp "explicitly advocated" this disconnection between the artist and their work or stardom. "In so doing", he adds, "they laid the foundations for a central tendency of post-punk" in the late 1970s, as evinced by the first four albums by The Cure (featuring blurry photographs of the band members) and Factory Records' dark-colored covers with serial numbers.