Screening question, First screen than photograph on gelatin

I faced with an interesting problem , when you make different depth and width dots screen in to gelatin for rotogravure process , first you enlarge the screen on to gelatin than the photograph to be able to create a screened photogravure in to gelatin later to be acid etched and go deep on to copper.

What is the size of the first screen dots , widest , mid or narrowest ?

May be highest resolution dots combined in a angled row ? I dont know.