Catalogs are always close to 95% about Product Information. To be effective, one has to have extensive product knowledge. Can't publish what you don't know.
That includes Osha Info, Installation, Parts-That-Go-With, Upselling and Down Selling. And. there are videos to be created, print catalogs, and focused print catalogs to be created as well.
"Mini-Print" is where Print-on-Demand matters. Tailored print catalogs are where print-on-demand shines and is very valuable. Catalogs can match particular markets, particular product categories, particular regions and individual people-types.