I shot some Velvia slides awhile back and has some 4x6s printed.. I LOVED a few shots, so wanted them blown up on an 8x12. I dropped them off to the same printer that did my 4x6s, and just got them back today. All of the shots are dark and flat, the color is just no good. But when I look at the 4x6s, they are great.... My question is, is this a printing error? Should I contact them and say I'm not happy with my prints? or is it that when you enlarge it you lose color? I'm totally clueless about slides and don't want to be told that it's MY fault if it really is their printing error. If I took the 4x6 in and showed them would that make it easier for them to duplicate? At $6 a pop I could have printed the same results on my own computer!