I have recently had two pens, piston fillers, both celluiloid, filled with different Akkerman inks where over time the ink colour has changed remarkably.
I have a good number of pens, many of them piston fill or self fillers because that's my wont and because most of them are older or vintage. I have never seen such a striking change of ink colour as I've just experienced though and wanted to ask if others have seen the same.
The first case could be put down to time in the pen with the ink losing water and becoming more saturated: This is a Geha pen from the 60's filled with Akkerman SBRE Brown ink in mid December that I suddenly thought might be MB toffee brown after filling another pen with SBRE Brown recently. I had not noticed the change as I was not very familiar with the ink and it had been a gradual change.
The second case has me a little concerned though: Akkerman Ceruleum Blauw Van Vermeer (what a mouthful) was filled into one of my NOS Tibaldis on 16th of this month and by today, 18th it has lost almost all colour and is unrecognisable. It looks like washed out Pelikan 4001 blue black.Looking back at my diary and notebook, this effect has been gradual over the last 48 hours but most noticeable since last night.
Again, I have the same ink in another pen, a lever filler in that case which has been filled since beginning of February and in that pen the ink colour is absolutely true.
Can celluloid nitrate affect ink colour like this? Do I have a case of the Tibaldi killing the ink?
I am tempted to flush it out and refill but don't know if the ink is not compatible or the pen is going to be a problem with all inks.
Obviously I'm hoping it's not the latter, I can't cope with pens that I can't use.
Going to try a photo to illustrate but I've always struggles to photograph writing samples well - apologies in advance.