My Polaroid Lab vignettes quite badly, I don't know whether they all do or it's just this one. I would like to create multiple emulsion lifts but the vignetting is really getting in the way, so I'm trying to find a way of masking to counter this effect. I created a grey image in Photoshop and made a Polaroid from it using the Lab, the next step will be to find some way of using this as a mask, then calibrating the settings for tones and contrast.