Heyho,
So, I came across a strange problem with the maps for the Curragh event last night, where the purple color used for the course was slightly darker/bluer than usual, making it very hard to read. This only came to light when I had recieved the printed maps, and by that stage it was too late to rectify, but here's how I could have avoided it, in case anyone ever has similar difficulties.
The OCAD map for the Curragh had the Purple color defined as 0,100,0,0 (CMYK). This is how Purple is supposed to look, according to IOF mapping standards. I didn't have OCAD installed, so i decided to use Open Orienteering Mapper to make the map corrections for the event. In the end, I made serveral adjustments to the gorse over serveral weeks. What I didn't realise that somewhere along the way, the Purple color definition had changed to 20,200,0,0 (CMYK) - adding some Cyan into the mix, producing a darker/blue-er purple. I still dont understand how this happened, but there you go.
When I imported my modifed OCAD map into Purple Pen, all seemed fine - the two colors dont look dissimilar on-screen. I generated PDFs (still looked ok to my eye), and only realised the change in hue when the printed maps came back from Prontaprint. I did some experiments yesterday, to figure out what was wrong, and I discovered the issue with the color values. I also noticed that in Purple Pen, I could have fixed this like so:
1) With your event opened in Purple Pen, click on "Event", then "Customize Appearance"
2) Untick "Use purple color from map"
3) Set the CMYK values to 0, 100, 0, 0 respectively, to ensure a pure magenta Purple color
4) You can also adjust the line thicknesses, etc, if required - I found the defaults a little thin at 1:7500
5) When generating the PDFs, select CMYK Color Model (its the default anyways)
Anyways, just putting this here in case it helps someone else in the future!
Dave
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FYI: Purple Pen, Issue with Overprinting Purple Color
