Here is the piece that the vina mould was originally used for.Vinamould is a good material because it can be used repeatedly.The material can be cut up and remelted although I prefer to keep the moulds I case I want to use them again.
For this work I cast the aeroplanes in clear casting resin with an amber pigment added to the solution.Personally amber is the best pigment I have yet used in resin, it mixes and fuses perfectly with the clear resin, the blues and greens are tricker to use and then to look to fabricated.A secound mould is made for the 120 x 120 x 26cm block of clear resin. This mould is made in MDF wood and sealed in several layers of shellac( Fossil based varnish normally used for french polishing floors)and waxed.
The resin is added in layers.The reason for this is two fold -
1.So that the planes and whatever else can be added at intervals in the casting process.
2.A base catalyst is added to the clear resin viscous liquid which a chemical endo- thermic reaction.If too much resin ,(say anything over 5 kilos in this case because it is a open large surface area)the resin will fracture and crack when it begins to set.Resin moulds need large open areas to 'Breath'and release the heat given off as the reaction of the resin setting is taking place.Alternativly you can use slow curing resin but this much more expensive and in this case is not necessary. This should only be necessary where the open area is very small or where the mould is closed.
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