The Ama-iro (Sky-blue) Experience.

[IlikeInksandIcannotlie]

1 hour ago, inkstainedruth said:

Some blue-black inks have an iron gall content to them, and that might account for your experience with MB Midnight Blue -- it's not the paper so much as the oxidation of the IG content.  Mind you, I'm not sure if that is an IG ink or not.

It's the non-IG version. Both turn that colour even in a closed notebook. Must be some reaction of the dye with the paper or with the air. I will see what they look like on Rhodia someday.

[DrDebG]

As I look out my window to white, smoke-filled skies, I yearn for the beautiful shades of sky blue - from the almost iridescent purple at dusk to the clear, clean bright cyan blue.  Ama-iro is that subtle, clear mid-morning shade of sky blue when the air is clean, clear and crisp.  I love this ink, but it does not care for some of my pens.  Oh, yes, pens, ink and paper have an affinity for each other.  Ama-iro is absolutely stunning in my nicely wet Montblanc 146, but rejects my somewhat dry Visconti Michelangelo - it doesn't matter what paper.  But, Ama-iro does not care for my Apica notebook but seems to be in love with Tomoe River paper.  It is a favorite ink of mine.