Black was the first beat; blue, red and yellow were not long in coming.
As black then was completely empty, the printer has refused texts eg in (dark) blue print or any other color. This option is no longer apparent.
Thus, in the short term had to spare her:
Here at Amazon I found several deals. The previous reviews here were really helpful.
This will be at no. I did not directly ordered a 20-pack, but first "only." 10
Delivery arrived very early via UPS. TOP!
The cartridges are individually packed in vacuum bags and thus well protected until the actual use.
Since no real "instructions" was doing (the cartridge changes but no science is) I have made the exchange quickly.
First I tried to replace only the black cartridge - worked fine, but the printer immediately realized that this is not the original cartridge, and has refused to serve.
So exchanged all cartridges in accordance with the other reviews; Performed head cleaning, and lo and behold, the printer will print again how he is supposed to.
My layman printer user eye can not detect real differences between the original and "Fake" ink. Therefore - everything right and definitely a recommendation - also with regard to the seller.