This is the video on making latex build-up heads, to go with the one I did for making bodies. As usual, it goes by pretty fast, so you might want to watch it once to just look at the pictures, then a second time to read the text.
This is a way to make heads that have some movement, without having to sculpt in clay, make a plaster mould, and cast in foam latex or silicone rubber. The heads tend to be a bit rough, though not always as rough as these, it's hard sculpting at arm's length where I can't see what I'm doing, just so the camera gets a good view!
There are other options, like replacement heads or hard heads with clay or replacement mouths, but I haven't done any of those yet.
Part 2 will be how to sculpt, mould, and cast a head in silicone, for when you need something that is smoother or more accurate than this. It may be a while before I have time to do it.
Once again, thanks to Kevin MacLeod at Incompetech.com for the use of his music.