I recently aquired a referance book from Osprey publishing on modelling post war Tanks and Aircraft. It is a wonderful book full of how to's on super detailing.
My question is there is a referance to using Sepia inks and I have never heard of this.
So is it a product of a type of paint? The book mentions if it uses acrylics,enamels,or oils. So has anyone ever heard or used these "inks" and if so what is the difference between these inks and regular paints? It does mention that it is both hand brushed and airbrushed.

Warlock,
Sepia ink is a reddish-brown ink used mainly for calligraphy or pen and ink drawing. Check your local craft store. I have thought of trying both sepia and black drawing ink as a wash, but haven't gotten around to it. I do know that the sepia ink, when used for calligraphy, is kind of pale. So you may be able to use it as a wash. As for airbrushing, I believe it would take some experimenting. If you try it, let us know.

The use of inks, I think, is mainly a figure thing. My son does Warhammer stuff and Citadel has a large array of inks to use. I guess inks are more transparent that opaque, and are easy-flowing - perfect for catching small detail. A good friend of ours does soley Warhammer figures and swears by inks, the results he produces are spectacular! I've thought of trying some, but just haven't got around to it...

Thanks for the info guys. I did notiice now that you mentioned the small details that they were using the inks on parts of the models with a lot of detail. i.e cockpits, tailburners and such.
I may have to give it a try. thanks again

Can you run ink through an airbrush or will it gum it up?

Yes you can airbrush it. Almost all of the photos/graphics you see on the advertising banners along the roads are retouched/done with airbrushes and inks!!!
Ciao