When making platinum/palladium/kallitype prints the sensitizer gets absorbed into the paper fibers. Would extraneous light from a diffusion source 'sneak' into the paper fibers on either side of fine black lines to diminish their acuteness?

Is it something you can't really put a finger on, but when prints made from the same negative with both light sources are compared side by side, there is a quality of greater sharpness to the point source print?

I live in a relatively isolated area and have never seen hand coated prints on cotton rag papers.