Best Ink To Prevent Monteverde Artista Drying Out?

[PDW]

I loaded a no-name black cartridge in my new Artista, and it dried out after about a day (lying flat, not standing up). It was when I looked at the pen closely that I noticed that it lacks an inner cap, so I suspect it needs an ink that resists drying out in the nib.

 

What ink, preferably available in cartridge, do you use in an Artista that doesn't dry out? BTW I'm in England, so availability of Noodler's is variable.

Edited August 31, 2014 by PDW

[Pickwick]

If there is no seal in the cap, then any ink you use will dry out. Ink, like all fluid is subject to evaporation. You need to contact the company you bought the pen, and tell them of your problem.

[Newjelan]

I use my Artista with my Hobonichi Planner because the pen is small and it has a screw cap. The pen is used intermittently, for short bursts and a cartridge lasts ages. Most of my cartridges are Diamine or Private Reserve and I've had no issues at all with it drying out.