Preparing your own postively charged slides.

[Dialgo]

Good day to you all! I'm new here to the forums, and I'm glad to have found them! I'm a young biologist currently working in a dermato-histology lab, and I've recently been taking costs of operation into account in the lab I work in. I really have a passion for the job and the workplace, so I try to make every dollar go further. When I found out how much frosted slides vs frosted positively charged slides cost, I nearly fell over. The cost is incredible just for that positive charge. So I was thinking there must be a way to overcome this cost by placing a charge on them myself. Anyone have any clue how to do this? I've been brain storming on a few methods, but if anyone knows a clear sure shot way please let me know. Thanks in advance!