I looked into all different mounts that I could mount my slides, but after all the options open to me i decided that white card was the best option. Because i didn't want anything too fussy, also I wanted to print onto the slides the file name of each image to show that they have come from digital pictures, and it keeps the pictures annonomous.
I bought 300 white carboard slide mounts... they were very hard to get hold of, but I eventually found a company called Process Supplies.
Then I found a special paper called Transtext which i could print onto and stick onto each slide mount, its not visible unless you look very closely.
Below is an example of my templates I had to cut out... I could get about 30 to a page, and the file names.


My messy 'creative' workspace