Progress has been made with the design. final developed of the chairs aesthetics is under-way as all ergonomic consideration.
Here is a mock up render of what I'm thinking at the moment. Currently I'm not entirely happy with the legs and how they interact with the seat and lumbar support rest.
and for materials. my original idea was bent ply-wood wrapping over it self as you can see with the seat, i am not thinking about other materials such as Polypropylene as it has more "give" to it and can mould around the body better. There is a chair called the I B Pop which is made out of one sheet of Polyprop' that is folded into shape.
I shall look into ways i can fold my seat as one piece of plastic and use fixtures to connect them all together.
Still early stages still.