Could someone tell me please what the differene is between pigment inks and the (relative) new oxide inks? I need to replace some of my one inch pigment inks but am having difficulty finding them. Oxide inks seem to be the current thing and I wondered whether or not the end result looks different to the pigment inks. I was in Hobbycraft this morning and altho they had a few pigment inks they were selling them in packs as opposed to individually. Trouble with packs is I invariably find I don't use all of them so it's a bit of a waste of money.