Fred McKenzie wrote:

I did my unscientific tests using the same cheap glossy inkjet paper for
three printers, starting in August, 2002. I printed a photograph twice
for each of three printers. One set was kept indoors in a dark place.
The other set was placed inside the back window of my car, which was
exposed to the Florida sun while parked at work.

Dye-based ink from a Canon BJC-85 showed serious fading in one week.
Dye-based ink from an old Epson C60 printer showed about the same
serious fading in one month.

Pigment-based ink from an Epson Photo 2000P showed no serious fading
after one year. You had to compare it to the control print to see the
slight difference.

However the cheap glossy paper didn't hold up very well! The surface
became chalky, and you could easily scratch off the image with your
fingernail.

Thanks for reporting your study, Fred.

What do you mean by "cheap glossy inkjet paper" ?
Was this the Kirkland glossy photo paper perhaps made by Ilford?