Hi everyone,
I would just like to add another idea for you to make these cards… usually these cardboard sheets can be printed on both sides.
So if you would like to have a colored backside for the cards instead of just white, go ahead and choose a picture or pattern for the backside. As it is quite difficult to have individual pictures aligned for each card to be printed exactly on the same position on the backside, I just went ahead and used a camo pattern to print on the backside of the whole sheet. That way, all the cards are kind of randomly camo colored on the back which gives a nice touch to them without the trouble of alignment.
I chose a WWII “Flecktarn” (mottled camo) pattern used by the Germans, which I found on Wikipedia:
https://en.wikipedia.org/wiki/Flecktarn
https://en.wikipedia.org/wiki/Flecktarn#/media/File:SS_Platanenmuster_Sommer.jpg
You can of course use other camo patterns like US woodland:
https://en.wikipedia.org/wiki/US_Woodland
Wikipedia and/or Google picture search are a good resource for high resolution files to use for this kind of application.
I added an already edited file of that German Flecktarn ready to use to print on the backside.
Best wishes!