It would be a good practice to cover the excess of light coming from around the negative with a piece of black board or a mask. Without that measure light will "bleed" in your shot. Great demonstration.
can i print with a b/w laser printer a negative on folio, pictures from taken with a dsl camera, to make a oldschool laburatuar bath picture print process?
This video has several elements not recurrent in many others. There is also a drawback: with the glass over the negative you will not be able to adjust the negative into propper position.
So much wrong with this process. As mentioned by others no masking of excess light to combat flair. No concern for Newton rings. You'd be better off having some type of film holder to avoid contact between the glass / light table. Direct contact with the light table also raises the risk of scratches which then leads to nice sharp pictures of scratches on your image because the negative is on the same focus plain as the scratch. A copy stand is really not necessary unless you're going to be doing this every day and have to have a permanent setup. Focus peaking greatly simplifies aligning the negative in the lens with nothing more than a tripod.
