Parker "Quick Flow" ISO127-2 "Black" ink, Ballpoint Refill, original to the Jotter ballpoint.

Black when first put on the paper.

Becomes Blue on the paper a day or so later. Paper has not been wet, nor exposed to UV light.
The paper is kept under my obsolete circa 2013 Windows Surface RS tablet's keyboard, actually ...

Is this color change "normal" for Parker's "black" ink?