Going through that OCD moment when deciding what ink to first fill a new pen I thought I'd go for an old fave but little used Organics Studio Blue Merle.
The remainder of my 1/2 bottle has no blue in it at all but instead has magically turned to a dead neutral grey.
I shook the bottle in case of separation / sediment etc but no joys. That lovely vintage blue element has disappeared.
Just thought I'd let you all know in case, like I was, you were saving it for a special occasion.
KWZI, if you have a spare moment . . .