You know the lith books of Tim Rudman?
And maybe you want to ask the creator of Easylith and SE5 or look into his sample gallery: http://www.moersch-photochemie.de/co...ie/easylith/14
He has also a more complex chemistry kit for lith prints which allows quite a bit of tuning: http://www.moersch-photochemie.de/content/shop/lith