I was wondering what format you are using when you export to a Roland Verscamm printer.
RGB or CYKM
Ever once in a while I run into the problem of creating something using a color that includes either a red or blue that the printer won't print correctly.
When creating graphics are you only working with RGB colors?
The whole issue of color management is very interesting and also difficult to understand.
I am using an Oracal vinyl and have used the settings they suggest.
Thanks Jimmy
You want to work in RGB - specifically sRGB. Your RIP expects RGB and was designed to handle the setting of your CMYK ink levels on your Roland.
Probably the single best thing you could do to understand colour management is to download the PDF at the following link and read through it a couple of times.
http://community.coreldraw.com/wikis/howto/designer-s-guide-to-color-management.aspx
Dan