2009 Bowman Chrome Draft Mike Trout Auto

I am looking into this particular Trout draft auto and I noticed a difference between it and others I have seen. Every other one I have seen has been signed in blue while this one has been signed in black. The serial number checks out and the certified autograph issue is present as well. Something else about this signature is that he dotted his "i" compared to others where that isn't the case. Can anyone provide insight into the ink color and difference in auto?
0
Comments
For what you're gonna spend, I'd find another you're comfortable with.
I'm not speaking to the authenticity of the auto, only that to me it appears to be a blue auto that was left under incandescent lighting,
Here's an example in my collection that was once blue, but faded to an off-black.
Thanks for the insight, looks like that is the issue. Going through the PSA's realized prices I found another that may have been left in the light as well.
https://psacard.com/auctionprices/baseball-cards/2009-bowman-chrome-draft-picks-prospects/mike-trout/auction/582759
eBay Store
Greg Maddux #1 Master SetGreg Maddux #2 Basic Set
That is what makes this board so great, well done Bunch!
Successful card BST transactions with cbcnow, brogurt, gstarling, Bravesfan 007, and rajah 424.
I also wonder if over time if the surface area,in the Trout case the chrome that the ink is written on, has some form of interaction with the ink type used. Just a thought.