I had to print out an Employee Handbook of about 50 pages so I asked a Staples representative what paper I should use for double-sided printing. He recommended the Premium Bright White paper which I purchased and used. The job came out perfect. Excellent paper!
The paper is too thick. A lighter paper would be better. I used to get Hewlett-Packard Packers laser paper from Staples (Old Saybrook CT) but it was no longer carried. I bought the Staples laser paper as a substitute but it to be too thick and heavy.