On Saturday, 11 May 2019 22:14:34 UTC+1, Bob Eager wrote:
I don't know where to get tactical paper, but it sounds interesting

https://www.waterproofpaper.com/military-paper.shtml

Anyway...my ancient LaserJet 4 machines don't like Niceday paper, or
Xerox. They work fine with DataCopy, which I can get at a good price from
friends of my son.

My Konica (which is waiting to go to the great recycling plant in the sky after 14 years and just 1500 pages) was fine on Xerox paper from Tesco.

I remember DataCopy - used to get that at a "very good price" from work :-)

Owain