Coppa looks raw in middle

[JOSEPH FLORES]

Mahalo for your answer!!! Followed all instructions as above. You mentioned to use a vacuum bag, Umai or regular vacuum bag with or without vacuum? The crust is good and the meat tastes good. Just the center doesn’t look as cured as the rest and closer to a medium rare from the rest. (make sense ?) Yes I do have a slicer.
Aloha Kamano