Digital printers don't print tints the way offset or screen printing does. Mr Tint makes a tint chart you print on your own printer, so you can pick the tint percentage that really looks right for the job.
See it in the shop · Version 1.1.11 · Needs PowerScripts 3.8.42 or later
Open the PowerScripts panel (Window > Extensions > PowerScripts) and choose Mr Tint from the Tools scripts. The script has two tabs: Options and Preferences.
A new document opens with the chart: each row has the full-strength colour next to one tint of it, labelled with the tint and its formula. Print it on the printer and media you'll use for the job.
Tints are set up for traditional printing, where ink dots spread a little on the paper (dot gain), so a printed tint looks darker than the number says. Design software assumes that when it shows you a tint on screen.
Digital printers make tints differently: the RIP or print driver works out each tint from the colour profile, rendering intent and media. It doesn't know the business card your customer wants you to match was printed offset on uncoated card. So a 30% tint can come out lighter or heavier than expected, and a watermark made with a 90% tint on a 100% background can vanish or stand out too much.
Instead of guessing, print a Mr Tint chart, compare it with the sample or what you see on screen, and use the tint that matches.