Fixing faint printing on new printer (Epson WF-3640) on Linux

We bought a new printer, an Epson SF-3640 from Costco, and set it up for wireless on our home network. The problem we had is that it would print in a very faint draft mode from Linux, and I didn’t see any mode setting in the printer settings that would change this (typically “draft, normal, high quality” or something similar).

A bit of forum snooping yielded the answer I needed: Set the paper type to
“plain papers-High”

In Ubuntu 64-bit with Gnome desktop:
System Tools, System Settings, Printers, Epson, Printer Options, Media Type, plain papers-High

Found this on http://forums.openprinting.org/read.php?26,14443,14443