Shuttering

In the long run, Marvel's B&W newsstand efforts outlasted the closing and shutterings of both Skywald and Warren's doors but the longest lived of their horror titles only lasted two years, from 1973–1975.

[I]n practice, small deformations will occur in the shell on striking the shuttering, or... alternatively, some small deformations are due to slightly imperfect placing of the original formwork.