I was browsing the Northrup Photos website and came across this in connection with online printing services:
https://northrup.photo/reviews/print-services/It opens, thus:
"While some photographers make their own prints at home, we’ve found that using online print services creates better results at a lower cost. To answer the question, “Which online print service should I use?” we had the same print developed at more than a dozen different online print services in the US. Here are the results:"
Then follows an 11-minute video.
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