Common asked Q, deserves an answer even if this message is old.
Liquid lecithin will in general *not* form the liposomes that you want because it uses an oil base for the liquid. The lipid layer that makes up the liposome walls is hydrophillic on the inside and outside of the liposome, but hydrophobic within the wall itself. What this means is that if you have excess oil in the mixture it will sit within this wall and too much will prevent the water based liposomes from forming in the first place - at least with any degree of efficiency. From my studies the maximum amount of oil you should have in a liposomal mixuture is 3%.
That said most mixtures and recipes and instructions that you see for this are created by people who haven't adequately researched the topic and are ineffective at creating useful liposomes. Lecithin and the fluids they do this will are good for you anyway so when they see a benefit they think they got it right. Personally I don't think it's been adequately proven that that makes a big difference, but it might.
The vitamin C foundation forum is fairly expert at this topic and reliable as well. I recommend going there to get more reliable answers than most any other open forum. Remember with free advice you get what you pay for and the liposome experts (big pharma) won't set things right. It's all proprietary.