I've got a problem when printing from LR6 (but also in previous versions and on different computers). Before getting a new computer and a new printer, I've suspected that it is a printer problem but after getting a new computer and a new printer (first one was a Brother printer, current one is a Canon one), the problem persists. If I print several pictures, the colors are correct at the beginning, but at some point on a picture, colors become dull. It seems that from this line, a dark haze is laid over the picture. The subsequent images also show this haze over the complete picture. This usually leads to a lot of wasted paper.