If you've read my review of Noodler's Operation Overlord Orange and Burma Road Brown, you will know that I wasn't thrilled with either of those two inks. OOO is dull and bleeds hard through the paper (any paper), while BRB is dry and tends more towards green than khaki.
Luckily I just bought samples of these inks instead of full bottles. After reviewing and playing a little with them, I still found myself with a small amount. I wasn't going to throw it away so I decided to mix the remainder. I didn't know what to expect but I suspected that they would mix well, considering they belong to the same "family", namely Noodler's V-Mail.
I poured them into my Pilot Varsity and the result was more interesting (to me) than either of those two inks. I got a truer shade of khaki, lighter than Burma Road Brown, with hints of gold.
I can't tell what the exact proportions were but I would roughly estimate 5x OOO : 3x-4x BRB. There was slightly more Operation Overlord Orange, but Burma Road Brown, being darker, overcomes it, so the darker ink is more prominent.
In the Pilot Varsity it flowed really well. It also showed a little bit of shading. It managed to curb some of Operation Overlord's bleedthrough, though this one also bleeds through Rhodia a bit and a lot more through regular photocopier paper.
So there you have it: another successful ink mix!