Hope this hasn't been discussed already. I did a search and find stuff about contrast masking but I think this is a little different.
In PS one thing I like to use a lot is layers with the "overlay" blend mode. I particularly like the way it increases contrast. I'm wondering if there is a darkroom technique that is roughly equivalent to PS overlay? Mainly considering color negs at this point.
From what I've gathered, overlay is sort of a combination of screen and multiply (though simply making two layers and setting one to screen and the other to multiply doesn't produce the same results). As near as I can figure, sandwiching film in an enlarger would be roughly equivalent to the multiply blend mode in PS.
I've been playing around in PS by inverting the original image to make a "negative", then copying that to new layers with various adjustments and blend modes then putting an invert layer on top for the final image to simulate printing color negs on an enlarger. I can get some interesting effects, but can't quite replicate what I get using overlay.
Any ideas, insights or suggested reference materials that might help me?
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