Poisson - what's the best way to print velvia in 2017 - hybrid ra4 ?
Yes. But whoever does this, if not for yourself, must be familiar with the custom profiling (colourimetrics) that Velvia requires (neither Adobe or sRGB — I think it is a modified ProPhoto/AdobeRGB mix [ ? ]).
Wet (machine/LED exposure) RA-4, or giclée to quality media e.g.
Canon BFK Rives textured or
Ilford Galerie Smooth Pearl, or even one of the pricey
Hahnemuhle stocks). The lab's recommendation should be followed for recommended media based on presentation of the image, the scan and intended output. I am very partial to
Kodak Supra Endura Metallic as it catches spot illumination and gives water the expected sparkle (but of course, you have never seen water that does
not sparkle, have you!?

; of course, you could always use a Leica lens for added sparkle...now, whoever said that??)
When specifically intended for RA-4 or giclée printing, Velvia benefits from slight over-exposure (
but, overexposure is not recommended when there is a balance required of recording both highlight
and shadow detail). I typically give +0.5 stop. But one specific person's practice for RA4/giclée is not necessarily across-the-board gospel — there are a couple of others I know of who give 1 stop additional exposure, and this is for large format, perhaps a limitation of the equipment. Seek advice from the lab you are dealing with, or if home printing,
bracket the same scene + /
0 /
– (0.5 steps) so you can immediately see the effect of deliberate (small) over- and under-exposure on the lightbox (underexposed trannies will print darker; trannies with slight overexposure will print well, so you will need to experiment).
My steps have for a long time been 0.5 Steps of 0.3 is usually too little or too much e.g. +0.6 — resulting in gross overexposure of highlights — gross overexposure is not recoverable in post or printing and it is a travesty to resurrect solid shadows. The best practice is to master exposure in-camera, and not on a computer screen.
With the exception of the long-dead Ilfochrome Classic, I have not seen Velvia or Provia printed in a traditional darkroom for many years — probably around 1995 or '96 (which is about when I last had a darkroom!).