If you are going to print these then you are much better served by *PostScript* (PS) than *SVG*. *PostScript* engines have better quality checks than *SVG*. But more than that *PS* actually defines printer color spaces something that *SVG* does not do well at this point, not that most viewers would even begin to support this.

Regardless of format issues you should be talking about the manufacturing with the manufacturer. Not us, so the only way to iron out manufacturing issues is to talk with your manufacturer about their requirements and software used, not speculate on what they use.