You said:
>Do I assume correctly that the "raised edges" acts as a dam?
Yes.
>What is the thickness of the coating after it is poured? I trust its no where
near 5mm.
Probably is with the paper. You pour until the paper is covered.
>Why is this superior to brushing or rolling the gelatin on?
Because unless you work in an ambient temperature at that of the gelatine or
above the gelatine will gel before it has levelled out. Try brushing or rolling
jell(y)(o).
> Which gelatiin are you using?
See note to Judy.
>BTW, you previously described the wall lining paper as thin. What's sold here
>as wall lining paper is rather thick, so that it can span large cracks. It is
>highly absorbant. Is this OK?
Sounds fine. It's just that lining paper tends to be thinner than normal wall
paper. Could you post where you get your lining paper from as it appears to be
an unknown quantity on Manhattan.