Thus, it is unfortunately 100% incompatible with my printer.
Edit:
I then still bothered to experiment with the paper for another hour.
The fact is that the paper is not feeding as a single sheet.
When stacking, it did not work at first, then suddenly the second sheet.
It turned out that the papers are not all the same size. There were a few (probably only 1/10 mm wider), the problems caused when moving. After each pressure I had to realign the remaining paper.
After much back and forth I can print a few test images, the color does not have to hide behind the original HP photo paper. Grayscale are on the HP paper but better classes.
The time that I can muster but also with try-and-error, weighs the savings on in any way.
Maybe I had a bad batch. But do not care - that can not be allowed to happen.
Borderless printing is the HP way, possible (but you have to adjust A6 and must not, as usual 15x10 Select as paper size).
The paper is on the surface rougher than the HP Paper (advanced).
The photo paper is available in 2x 50 pieces. Wrapped in foil (I do not like - I prefer the paper)
Pro Pack, there is a 'protective cardboard' up and down.
I revise my point rating from 1 to 2. Personally, I have not had much luck & joy. In principle, the paper seems to be fine. Unlucky you can have with your printer.
Edit 2:
The statement on the good colors I have to revise something. This applies only if you plan looks straight (90 °). Once you change the viewing angle - for example, at 45 °, then the colors including unfavorable light very distorted are (blue suddenly purple shimmer). This reminds me of monitors with TN displays. Since many eh consider the photos above, I have not changed the assessment and 2 left (trend decreasing).