In photography I have struggled to choose products, often I have to rely on my experience (e.g. it takes six months to discover that your Epson EcoTank printer makes prints that fade in six months) and specialized forums (DPReviews) You might find lightfastness rankings for some printers at
if somebody paid them to do the research otherwise you might have rely on heuristic 'pigment based inks are relatively lightfast' and that at least one other person who does similar work, has similar skills, and uses similar method gets good results. That still doesn't help with problems like '90% of instances of this Sigma lens seem to be pretty good but 10% have defective autofocus'.
I find online reviews are close to worthless because there are so many people who don't know how to use gear or have unrealistic expectations. At Best Buy I saw a review of a printer where somebody showed pictures of prints they made where they printed on the wrong side of photo paper and blamed the printer, for instance.
http://wilhelm-research.com/
if somebody paid them to do the research otherwise you might have rely on heuristic 'pigment based inks are relatively lightfast' and that at least one other person who does similar work, has similar skills, and uses similar method gets good results. That still doesn't help with problems like '90% of instances of this Sigma lens seem to be pretty good but 10% have defective autofocus'.
I find online reviews are close to worthless because there are so many people who don't know how to use gear or have unrealistic expectations. At Best Buy I saw a review of a printer where somebody showed pictures of prints they made where they printed on the wrong side of photo paper and blamed the printer, for instance.