Stone to Bowl grand finale

Last week was my final week of work at Scottish Sculpture Workshop on my VACMA funded Stone to Bowl copper project.

It focused on getting the bellows organised so that I can work anywhere in the landscape. Monday was spent fixing the blower which had arrived fractured. Eden Jolly did most of the work as it involved tig welding, but I did the cleaning of the joins and offered cups of tea. Eden and Fleur (an Erasmus student) made it a super wee base and I went to Portsoy to get it some flexible tubing. fanblowerSept18By Wednesday all was ready to return to copper smelting trials. The smelt balls tend to over heat in the shaft furnace as it’s hard to see what is going on.

smeltfurnaceSept18

So on Thursday I dug a pit furnace and trialed that smelting with great success.I got 35gm copper from 50gm ore in 30 minutes and using about 2kg of charcoal.

smeltballSept185i

On Friday it was time to trial the bowls mentioned in the project title. This was using ore I’d smelted alloyed with 10% silver. The photo shows the open mould after casting. The copper did not complete the pour. I need to redesign the bowls with a thicker base. Even after heating the moulds and with sling casting, the copper would not stay molten in such a thin walled vessel.

slingSept18i

Spending 4 weeks developing processes and tools has been brilliant and the work goes on.

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Stone to Bowl

bloweri

Finally the hand cranked forge blower has arrived. This is hopefully the last piece of the Stone to Bowl project. The forge blower will deliver air to the furnace, powered by hand rather than electricity. I’ll find out next month at SSW if it can be made to work. If the bellows can be hand powered it means that I can work anywhere,

day7smeltblower

This is the model we hope to replicate.

The allure of copper – Stone to Bowl

copperbowl2018

Alongside the traditional copper casting project I have done a copper/silver cast; using plumber’s copper and silver.

copperpourjuneiicopperpourJunei

and two-part sand moulds. This is partly sustainable, with all materials being recycled; but the heat used is gas.

copperpourJune

copperbowl2018i

One of the pieces sold unfinished at ENOS 2018. The bowl has a metal ‘pebble’ inset, a blue heat patina and is almost clean copper on the exterior because I used a different greensand on the outside.

Some learning – try different sands to give cleaner surfaces but retain textures, cost in the silver, keep experimenting, copper is an attractive metal although challenging to work with.

Stone to Bowl

1smelt

The New Year bonfire was the first trial smelt of the year. I didn’t expect much from it and it wasn’t a great success, because the bonfire dropped through into the rock pool beneath it. It seemed a good way to celebrate the New Year though.

The photo is the wet remains when the bonfire had burnt out, a gift to the sea.