Carbon Type-A
Carbon support films with a removable Formvar on the opposite side of the grid. When the Formvar is removed, by dipping in solvent, a pure carbon film remains. (Note: The Ultrathin Carbon Film on a Lacey Carbon Support Film, Prod. No. 01824, has no Formvar backing.)
These films are stable under all EM operating conditions and are for use where the presence of a Formvar layer cannot be tolerated.
Pure carbon films tend to be more delicate than those with a Formvar backing and require more delicate handling during specimen preparation than most other support films.
