Thursday, 11 December 2014


Before I can cast the seats to go in 119 I need to renew the mould.

This is the third mould I've made from the master now.

I usually reckon that each one is good for around 20 casts, but with each Super Barn carriage needing 7 sets of tables and chairs you can see that I have to produce a new mould after every third carriage or so.

Because the seats are quite deep - at least 1cm high - the mould swallows a lot of RTV rubber, about 30g, which is usually enough to make a mould for a typical SAR wagon side.

So I can get many more wagons out of each mould than I can carriage interiors, which I suppose makes these seating sets less efficient to produce.

That said it's still much quicker and easier to cast all the seats than it is to make them from scratch.

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