Hi Nick
First of all the Roland Colour Library relies on what is often called ‘spot colour replacement’.
Effectively the Roland Colour Library is a set of named spot colours and when the file is exported, the names of each colour used are exported in the file.
When the rip loads up the file, it sees the names used in the file and matches them up to a specific CYMK value that is held in a table inside the RIP. It therefore bypasses the normal ICC profile system so you get an consistant repeatable colour when you print it.
However, and a lot of people miss this, you must turn on this system in the RIP before it will work. You need to go to ‘EDIT – Queue A Settings’ and then to the File Format section. In here you have ‘named colour settings’ and ‘special colour settings’. Turning these on should solve your problem.
With respect to achieving a decent gold colour, we need to think a little outside the box of what colour it should be. It needs to be more than one colour. When we look at something gold, we are looking at a metallic colour, and, as with all metallics, the colour changes with the angle of incidence and also reflection of the environment, etc. So the trick is not to use a single colour.
To make a more convincing gold, use a linear graduated fill where the fill repeatedly changes from a darker gold yellow to a lighter gold yellow. Alternatively there are photoshop and SignLab plug-ins from Alien Skin called Eye Candy that can do this for you – but wil cost a few quid. However, a bit of experimentation with a linear graduated fill tool should so you right.
Best Regards,
Mike