E-6 is the reversal process for color slide (transparency) film such as Fujichrome and Ektachrome. It requires dedicated chemistry and tight temperature control, so fewer labs offer it than C-41.
2 labs
〒251-0041 1-chōme 3-1 Tsujidōkandai, Fujisawa, Kanagawa, Terrace Mall Shonan 4F
Shonan Fujisawa OPA 1F, 22-3 Minamifujisawa, Fujisawa, Kanagawa 251-0055, Japan