Hi all
For my HMS Rodney build I needed to make resin castings to provide extra cargo freighters. I thought a simple "how to" may be of help to some people. I must confess here and now that most of my resin casting knowledge comes from Simon T who helped me no end a few years ago when I first had a go at casting.
This is what I wanted more of. From a set of 1/700 harbour boats.
For casting you need to provide a casting block on the base. It will be sanded off the copies.
I make a suitable sized box using that waterproof card from milk or smoothie cartons. I stick it together with a cheap hot glue gun.
The original is stuck to the base of the box with double sided tape.
The rubber for the mould is mixed by weight. I part catalyst to 20 parts rubber.
Stir well. you have plenty of time as the rubber is slow to cure.
I use a scale to weigh out the rubber and catalyst.
Pour the rubber into the mould slowly and use a coffee stirrer or similar to gently prod around to dislodge air bubbles.
It says that the rubber will cure in between 8 and 24 hours. I leave it for the full 24 hours. I then cut down each corner of the card box to release the mould.
This is what you get. Carfully wiggle out the master.
The resin I use has two parts. Mix 50/50 by weight. Now the resin, once mixed goes off quickly so don't hang about. Stir well but gently to avoid air bubbles as much as possible.
Pour the resin into the mould and have a good prod around to try to get the resin into all the corners etc of the mould.
Leave for an hour or so and wiggle the casting from the mould and hey-presto - then there were two! :hungry:
I hope this may be of use to some people who haven't tried resin casting before.
NOTE - It is perfectly OK to make copies for your own use but you must not sell them.
Jim
For my HMS Rodney build I needed to make resin castings to provide extra cargo freighters. I thought a simple "how to" may be of help to some people. I must confess here and now that most of my resin casting knowledge comes from Simon T who helped me no end a few years ago when I first had a go at casting.
This is what I wanted more of. From a set of 1/700 harbour boats.
For casting you need to provide a casting block on the base. It will be sanded off the copies.
I make a suitable sized box using that waterproof card from milk or smoothie cartons. I stick it together with a cheap hot glue gun.
The original is stuck to the base of the box with double sided tape.
The rubber for the mould is mixed by weight. I part catalyst to 20 parts rubber.
Stir well. you have plenty of time as the rubber is slow to cure.
I use a scale to weigh out the rubber and catalyst.
Pour the rubber into the mould slowly and use a coffee stirrer or similar to gently prod around to dislodge air bubbles.
It says that the rubber will cure in between 8 and 24 hours. I leave it for the full 24 hours. I then cut down each corner of the card box to release the mould.
This is what you get. Carfully wiggle out the master.
The resin I use has two parts. Mix 50/50 by weight. Now the resin, once mixed goes off quickly so don't hang about. Stir well but gently to avoid air bubbles as much as possible.
Pour the resin into the mould and have a good prod around to try to get the resin into all the corners etc of the mould.
Leave for an hour or so and wiggle the casting from the mould and hey-presto - then there were two! :hungry:
I hope this may be of use to some people who haven't tried resin casting before.
NOTE - It is perfectly OK to make copies for your own use but you must not sell them.
Jim
