I have a Roland BN-20 Printer/Cutter and am working around using Inkscape for the design program rather than Adobe Illustrator or Corel Draw.  Versaworks 6 is the program that Roland connects to and Versaworks has cutcontour plugins for Illustrator and Corel Draw.  I have mimicked the cutcontour color (100% magenta) and this did not work.  I wrote a .gpl file for Inkscape called CutContour with the 255 0 255 RGB code.  I know that does not equal 100% magenta on the CMYK color set.  I also tried 236 0 140 RGB which does match 100% magenta.  This did not work either.  This try I did not name CutContour, hopefully that wasn't the issue.  On top of this I tried different (hairline) widths in conjunction with the two cut colors and I tried 0.1 pt, 0.01 pt, .25 pt, .025 pt and .001 pt (Adobe Illustrator width).  No luck with this either.  Has anyone gotten around this problem yet?  

Thanks!

Inkscape does not support spot colors.
Some more info here.
https://www.rolanddga.com/blog/2016/06/17/15/18/the-perfect-setup-file-preparation-for-printcut-production

sK1 supports spot colors. 

https://sk1project.net/sk1/

Do you know if Inkscape has future plans for a spot color option?  

Maybe you can use Inkscape Plugin that exports to Roland CutStudio:

https://github.com/mgmax/inkscape-roland-cutstudio

After doing some research, an SVG file at the root is simply an XML file therefore the "CutContour" and "spot color" thing can be manually added to the file. I just can't figure-out for the life of me how to do it. I will do some more research and see how I can achieve this as I see I'm not the only one with this problem with Roland printers.

@Aero: I have downloaded SK1 and will try it.

The printer vendor sent me an EPS file with the cut contour (attached to this message). I can open-it up in VersaWorks and it is what I am expecting. If I open it in GIMP, the <Alpha> channel appears to be just black and the shape of the other RGB channels. When I try to open this file in Inkscape, it says "Fail to load the requested file" therefore this perhaps indicates that because the file has extra info in it such as the CutContour tag and cannot open the file as it does not know how to interpret it.

So I guess I'm getting closer, it's just a matter of figuring-out how to fix it.

Ben

Maybe the PDF format and Affinity Designer is worth a try?

You can copy and paste between Inkscape and Affinity if you enable svg to clipboard in Affinity preferences.

See this post I put yesterday where I explain in details how to do it using Inkscape and Scribus: https://inkscape.org/forums/cutplot/design-eps-file-wtransparent-background-for-roland-bn-20a-printercutter/