I've been doing mostly sketches lately but I can't quite seem to get them screened onto paper exactly how I want them. I crank up the contrast to make sure I get a nice black for the film but that messes with the level of detail I originally wanted. Anyone have some techniques they can share?
Matt, you can get some nice sketch effects by using clear drafting mylar with a slight tooth (lumpyness) on the surface.
Use a soft granular pencil on this, and shade heavier than you want it in the light areas. the idea is to get the pencil to break up in fine bits, these will block light and create the shade effect...it's not very stable, don't rub it before you burn it.
you need to burn this on a fine mesh and use a good high rez stencil material.
another way is to use a litho crayon or conte crayon on clear mylar or poly or vellum that has been sprayed with some clear fixative, this will give it some tooth.
Otherwise, if you want to process it through a computer you need to scan it in then create a diffusion dither output, this will give you a random dot which looks more like shading than a halftone.