I print my stuff out on cardstock and then coat each side with 3 coats of clear nail polish, drying well in between coats. Then I cut out my images. It makes it almost like plastic.
I've read that putting them between packing tape works well too.
Try Judikins Microglaze, it's a wax sealer and can be purchased right here on Etsy.
I seal all my images with Modge Podge before using glaze or resin
I agree with TKI, use Modge Podge.
Micro Glaze is the BEST. Acid free and doesn't add any depth to your pendant.
I sell it at my sight
I also seal images with at least 2 coats of Mod Podge and dont have any images run.
I have to get my images printed on laserjet printers instead of inkjet. Laser jet doesn't bleed.
I just started using a product called Nunn Design Sealant.
It works great!