While slide-negative tutorials and actions are quite common, it is rare to find a colour-b/w cross-process set that can accurately approximate this darkroom effect.
E6-C41 B-W Cross Process Set by ~
WallStorm is a great set of actions that really invites you to experiment with them. (
Suggested by `tiganesc and Featured by
`bleedsopretty )
500+ Free Photoshop Actions For Photographers.
Thanks
[link]
will credit if used