>>4245504It's thermal, so they're all doomed to fade. How quickly depends on the material, quality, and how you store it.
Your question did make wonder if there's a way to fix the printing, but I haven't found anything so far. Interestingly if you have a faded receipt you need the information off of, you can restore the image by (ironically) applying heat. Though it will be a negative (but readable,) image.
