I have recently ventured into the world of vintage pens and have purchased two English Parker 51s for use as EDC/workhorse pens. I also picked up a few bottles of vintage Quink Permanent Blue with Solv-X that were made in England as I figured the ink should most definitely be safe to use in a Parker 51. I'm a blue ink girl at heart for my everyday inks, and tend to avoid black inks. Blue-blacks are hit or miss for me.
I used to use Quink Washable blue back in my college days and discovered from unpleasant personal experience that it fades very badly. Sadly, I documented a significant portion of my flight time in my logbooks during my undergraduate flight training hours in Quink Washable Blue and those entries are now barely legible. Fortunately, enough of my logbook is in other inks, mostly ballpoint, that it's still usable as documentation of my flight time. I no longer fly professionally, so I am not concerned about the longevity of the entries as much anymore, but I would like to prevent similar ink fade in my current logbooks for flight and scuba diving, as well as in journals, record keeping, and correspondence.
Just how permanent is the Quink Permanent Blue with Solv-X? Will I need to worry about significant fading, or is it pretty hardy?
I have also purchased some Rohrer & Klingner Scabiosa and Salix inks, but wasn't sure they would be good choices in the P51 pens due to them being harder to completely dismantle and clean should the collector clog with the IG inks. I intended to use them in other more easily cleaned pens. Are my instincts correct to avoid IG ink in a P51?
I've attached photos of the box and bottle here so you can see the ink. There's no date on the box or bottles, so I am uncertain just how old the ink is, but my guess is not terribly old. The bottles are 2 fl. oz., or 57 cc.