The Wiki article quoted by Sirius Glass is a reasonable explanation of gamut but it does not say, as far I can see, that the colour gamut of an optically exposed print covers the complete gamut of the human vision and if it did it is wrong because no printing process or capture mechanism, whether photographic or mechanical, analog or digital, yet devised can achieve this. There are certainly differences between prints on RA4 papers optically exposed and those printed digitally from scans but a scan made on any flatbed scanner is not the best starting point for comparison. As Hikari points out, it's horses for courses since both alternatives have their strengths and weaknesses but with the increasing tendency of the remaining manufacturers to balance RA4 papers specifically for laser/LED exposure because that's where the main market is, digitally exposed RA4 may well be the only viable alternative long before these papers ever disappear from the market. OzJohn