Page 47 - Tạp chí bonsai cây cảnh BCI 2016Q4

B Prop the stone on plasticine or putty and get it C
sitting the way you would like, looking at the front of
the stone. Check side and top views.
C Select a plastic container large enough to hold
the stone without it touching the sides. Place the stone
in the container, with its plasticine props, to check.
Mark a pencil or chalk line on the stone to indicate
how deep you want the stone to sit in the wood base.
Coat the inside of the plastic tray and the base of the
stone with baby oil or similar. This is to allow good
release of the stone from the mold and the mold from D
the plastic container.
D To create a Plaster of Paris mold, mix the plaster
and water to the recommended consistency by fol-
lowing the package directions; pour it into the plastic
container, tamp down to level the plaster and then
slowly lower the stone together with its props into the
plaster. The props are there to make sure you have the
stone angle right and to allow the plaster to flow under
the stone. Best if the stone does not touch the plastic
tray. You only want enough Plaster of Paris in the tray
to come up the stone to a little above where you want
the top of the daiza to be. Later, the extra plaster will
be sanded to the desired level.
E When the plaster is set, remove the whole thing
from the plastic container and then carefully separate
the stone from the mold. I do this by first trimming
around the base of the stone with a sharp knife to clean
up any unwanted plaster adhering up the side of the
stone, then gently tapping around the sides of the
mold with a piece of timber to dislodge the stone from
the mold. If the mold breaks you might be able to glue
it back together to be able to get your stone outline.

E

F When you have the stone out of the mold, using F
a belt sander, sand back the top of the mold to a flat
surface with sharp edges around the inside of the mold
at the level you want the daiza to be.

October/November/December 2016 | BCI | 45