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DLP4710EVM-LC: The areas in the projection that are supposed to be black are too bright.

Part Number: DLP4710EVM-LC

I use the dlp for 3D printing purposes and I project black and white images onto the resin surface. However the areas that are black on the image are still lit up by the projector to some degree. I have attached the image I send the projector and the resulting projection. 

Any insight into why this occurs and how it can be fixed would be greatly appreciated.