As an alternative to buying your own printer, if you can cope with the delay, there's many firms out there that will do really nice prints from digital photos at surprisingly low costs, delivered pretty fast.
Give how much I've wasted on unused colours of ink and printers just breaking entirely, that is how I now do the few photos I want hard copies of.
In passing, if taking shots to record precise colours (you mention glazes), I hope you've worked out you want some known colour reference cards or the like in every shot - nothing, whether digital or film, is going to give you accurate colours or luminance without post-processing.
Canon's DPP4 starts displaying RAW files from Canon Camera's processed as if by the Canon camera, as a feature, for precisely that reason: a good starting point.
Even if it didn't, the "ideal" recipe for displaying a RAW file as a JPG is probably relatively straightforward (how to form the luminance histograms, level of noise reduction & sharpening, etc.) and likely to give what appears to be the same results. I'd expect you'd only usually spot this with extreme pixel peeping. If the process was not straightforward, it would slow displaying the JPG in camera, and thus slow down the whole photography experience, so that's not going to happen!