From my own experiance, all professional printers should accept images that meet the following requirements:
- Images supplied as EPS
- Images using CMYK colour model.
The issues as it applies to Inkscape and SVG are:
- PDF and EPS formats have limited support for all the effects that are possible in SVG
- SVG and Inkscape use RGB colour model.
- SVG doesn't support bleeding?
These are the questions that need answering for successful use of Inkscape for print work:
- What effects when used in an SVG drawing will not covert to PDF or EPS?
- How do you define a colour model for a drawing?
- Can Inkscape generate files with bleeds?
- Are there work arounds?
Please contribute other requirements printers may have, other issues you are aware of, other questions that need answering, answers to the questions or general advise and experience.