Category Archives: Molding & Casting

Casting An Ammonite Fossil In Concrete

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The final part in the series of molding & casting an ammonite fossil. In this video, we finally get around to casting the fossil in concrete and we also make a cast with plaster of Paris.

The video footage is taken from two existing videos on the channel which feature concrete and plaster of Paris casting. There are also two other parts to go with this fossil casting video which are making the latex mold and making the mother mold with fibreglass.

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Quality Concrete Casting

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After a few weeks casting concrete pieces and statues at the end of August and in September here in the UK, we can show how a good quality mix of concrete will create a good quality concrete cast. There were a few ‘bug-holes here and there on this small batch of three, which can be remedied by a cement filler after the casts are cured and for future casting to spend more time tapping and vibrating unwanted air out of the molds and seeing the places in the molds where the bug-holes are likely to form.

The concrete recipe used for casting in this video: 1 X Part cement. 2 X Parts sand. 2 X Parts aggregate. PVA (UK) bonder/bonding agent. Plasticiser/plasticizer.

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Mixing Concrete For Casting

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In this video we focus more on the concrete mix used here at Dramamask Evolution and looking for a consistency which isn’t too firm and not too slushy either – a mix which keeps it’s shape, but is also cooperative in being moved around the mold/mould.

The concrete recipe used in this video: 1 X Part cement. 2 X Parts sand. 2 X Parts aggregate. PVA (UK) bonder/bonding agent. Plasticiser/plasticizer.

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Refining Concrete Mix For Casting Statuary & Concrete Pieces

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After a mix which was too dry in the previous videos, we mix our concrete to a slurry consistency to help with fluid casting and keeping trapped air to a minimum. In this video we cast a relatively large dragon and a skull candle holder. Both pieces can be found on the channel in model construction and mold making videos.

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Make A Three Piece Fibreglass Mother Mold | Full Series

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Part One: 0:00
In this part we concentrate on making the seams with aluminium foil, applying the release agent with consists of Carnauba wax and PVA solution.

Part Two: 06:12
In this part we lay up the fibreglass layers using polyester laminating resin, MEKP catalyst and strand matting.

Part Three: 14:33
In this part we attach the legs to the main fibreglass mother mold using pieces of wood for the legs.

Part Four: 19:27
The final part in this series of making a three-piece fibreglass mother mold. In this video, we trim the legs, drill the holes to fix the bolts in place and clean up!

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