guess the ink!

[tannie]

Sapphire Blue

[Pterodactylus]

Nope.... you see this color when you heat something up...

[tannie]

Steel blue? so many blues....

[Pterodactylus]

And we have a winner, well done Tannie.
Now it's your turn

[tannie]

OK let me do a quick search so I'll do something new

[tannie]

OK this might be a tough one:

[tannie]

(Leuchtturm 1917 dotted notebook)

[Pterodactylus]

P.W.Akkerman Parkpop Purper?

[tannie]

P.W.Akkerman Parkpop Purper?

Oooh, that does look similar, but no.

[Pterodactylus]

Akkerman Binnenhof Blues?

[tannie]

Akkerman Binnenhof Blues?

Wrong country / manufacturer but close on a global scale It is not a blue!

[TSherbs]

Waterman Tender Purple

[Pterodactylus]

J. Herbin Violette Pensee?

[tannie]

Waterman Tender Purple

nope

J. Herbin Violette Pensee?

nope

I think it's pretty uncommon / unknown. Think... rare.… (not raaahr, although you could think that too but you probably won't guess it then, just saying...)
I have seen ink-reviews and it is European (hint 1).

[datainadequate]

Caran d'Ache Ultra Violet?

[TSherbs]

rare inks are not in my ken

I'm out

[Wile E Coyote]

PRDCSSB = Private Reserve DC Super Show Blue (I think).

Sí!

[migo984]

Stylex Violet?

[Pterodactylus]

Seitz-Kreuznach Dark Orchid?

[tannie]

Caran d'Ache Ultra Violet?

No, it's brighter.