Category:Derbyshire Blue John - production
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English: Steps in the process of turning Blue John stones into decorative objects.
First, the stones are heated in an oven, then placed in a bowl of hot epoxy resin, and then further heated in a vacuum oven. This drives out air from the stone, and replaces it with the resin, which binds the otherwise friable crystal structure, allowing it to be worked.
After impregnation with epoxy resin, the stones are cut on a circular saw. They may be made into cuboids, for turning as bowls and vases, or flat slices, for making jewellery.
Cuboids are glued to a metal chuck and turned on a lathe, using pieces of broken grinding wheels, and then wet abrasive paper. Finally the chuck is removed by heating the glue, or - if the operator is brave - a sharp tap on the chuck with a spanner.
For making jewellery, the slices are marked out and cut into shapes such as circles or ovals, then finished on a grinding wheel. The rear faces are painted white.Media in category "Derbyshire Blue John - production"
The following 77 files are in this category, out of 77 total.
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Blue John dragon.JPG 3,456 × 2,304; 2.74 MB
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Blue John dust.JPG 2,304 × 3,456; 3.03 MB
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Blue John ornaments in preparation.JPG 3,456 × 2,304; 3.36 MB
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Blue John production - 1 resin - Treak Cliff Cavern - Andy Mabbett - 01.JPG 3,008 × 2,000; 1.82 MB
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Blue John production - 1 resin - Treak Cliff Cavern - Andy Mabbett - 02.JPG 3,008 × 2,000; 2.72 MB
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Blue John production - 1 resin - Treak Cliff Cavern - Andy Mabbett - 03.JPG 3,008 × 2,000; 2.25 MB
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Blue John production - 1 resin - Treak Cliff Cavern - Andy Mabbett - 04.JPG 3,008 × 2,000; 1.95 MB
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Blue John production - 1 resin - Treak Cliff Cavern - Andy Mabbett - 05.JPG 3,008 × 2,000; 1.93 MB
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Blue John production - 1 resin - Treak Cliff Cavern - Andy Mabbett - 06.JPG 3,008 × 2,000; 1.85 MB
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Blue John production - 1 resin - Treak Cliff Cavern - Andy Mabbett - 07.JPG 3,008 × 2,000; 2.05 MB
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Blue John production - 1 resin - Treak Cliff Cavern - Andy Mabbett - 08.JPG 3,008 × 2,000; 2.31 MB
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Blue John production - 1 resin - Treak Cliff Cavern - Andy Mabbett - 09.JPG 3,008 × 2,000; 1.92 MB
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Blue John production - 1 resin - Treak Cliff Cavern - Andy Mabbett - 10.JPG 3,008 × 2,000; 2.02 MB
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Blue John production - 1 resin - Treak Cliff Cavern - Andy Mabbett - 11.JPG 3,008 × 2,000; 2.35 MB
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Blue John production - 1 resin - Treak Cliff Cavern - Andy Mabbett - 12.JPG 3,008 × 2,000; 2.08 MB
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Blue John production - 1 resin - Treak Cliff Cavern - Andy Mabbett - 13.JPG 3,008 × 2,000; 1.8 MB
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Blue John production - 1 resin - Treak Cliff Cavern - Andy Mabbett - 14.JPG 3,008 × 2,000; 1.77 MB
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Blue John production - 1 resin - Treak Cliff Cavern - Andy Mabbett - 15.JPG 3,008 × 2,000; 1.9 MB
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Blue John production - 1 resin - Treak Cliff Cavern - Andy Mabbett - 16.JPG 3,008 × 2,000; 1.94 MB
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Blue John production - 2 sawing - Treak Cliff Cavern - Andy Mabbett - 01.JPG 3,008 × 2,000; 2.1 MB
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Blue John production - 2 sawing - Treak Cliff Cavern - Andy Mabbett - 02.JPG 3,008 × 2,000; 2 MB
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Blue John production - 2 sawing - Treak Cliff Cavern - Andy Mabbett - 03.JPG 3,008 × 2,000; 1.82 MB
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Blue John production - 2 sawing - Treak Cliff Cavern - Andy Mabbett - 04.JPG 3,008 × 2,000; 1.88 MB
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Blue John production - 2 sawing - Treak Cliff Cavern - Andy Mabbett - 05.JPG 3,008 × 2,000; 1.62 MB
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Blue John production - 2 sawing - Treak Cliff Cavern - Andy Mabbett - 06.JPG 3,008 × 2,000; 1.74 MB
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Blue John production - 2 sawing - Treak Cliff Cavern - Andy Mabbett - 07.JPG 3,008 × 2,000; 1.68 MB
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Blue John production - 2 sawing - Treak Cliff Cavern - Andy Mabbett - 08.JPG 3,008 × 2,000; 1.76 MB
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Blue John production - 2 sawing - Treak Cliff Cavern - Andy Mabbett - 09.JPG 3,008 × 2,000; 1.77 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 01.JPG 3,008 × 2,000; 1.87 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 02.JPG 3,008 × 2,000; 2.03 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 03.JPG 3,008 × 2,000; 1.81 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 04.JPG 3,008 × 2,000; 1.8 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 05.JPG 3,008 × 2,000; 1.63 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 06.JPG 3,008 × 2,000; 1.7 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 07.JPG 3,008 × 2,000; 1.73 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 08.JPG 3,008 × 2,000; 1.72 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 09.JPG 3,008 × 2,000; 1.53 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 10.JPG 3,008 × 2,000; 1.54 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 11.JPG 3,008 × 2,000; 1.65 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 12.JPG 3,008 × 2,000; 1.64 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 13.JPG 3,008 × 2,000; 1.68 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 14.JPG 2,000 × 3,008; 1.76 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 15.JPG 2,000 × 3,008; 1.77 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 16.JPG 3,008 × 2,000; 1.67 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 17.JPG 3,008 × 2,000; 1.74 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 18.JPG 3,008 × 2,000; 1.64 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 19.JPG 2,000 × 3,008; 1.9 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 20.JPG 2,000 × 3,008; 1.82 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 21.JPG 2,000 × 3,008; 1.78 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 22.JPG 3,008 × 2,000; 1.75 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 23.JPG 3,008 × 2,000; 1.65 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 24.JPG 3,008 × 2,000; 1.7 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 25.JPG 3,008 × 2,000; 1.72 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 26.JPG 3,008 × 2,000; 1.73 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 27.JPG 3,008 × 2,000; 1.76 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 28.JPG 3,008 × 2,000; 1.74 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 29.JPG 3,008 × 2,000; 1.77 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 30.JPG 3,008 × 2,000; 1.77 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 31.JPG 3,008 × 2,000; 1.75 MB
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Blue John production - 3 turning - Treak Cliff Cavern - Andy Mabbett - 32.JPG 3,008 × 2,000; 2.03 MB
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Blue John production - 4 jewellery - Treak Cliff Cavern - Andy Mabbett - 01.JPG 3,008 × 2,000; 1.9 MB
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Blue John production - 4 jewellery - Treak Cliff Cavern - Andy Mabbett - 02.JPG 3,008 × 2,000; 1.65 MB
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Blue John production - 4 jewellery - Treak Cliff Cavern - Andy Mabbett - 03.JPG 3,008 × 2,000; 1.67 MB
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Blue John production - 4 jewellery - Treak Cliff Cavern - Andy Mabbett - 04.JPG 3,008 × 2,000; 1.56 MB
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Blue John production - 4 jewellery - Treak Cliff Cavern - Andy Mabbett - 05.JPG 3,008 × 2,000; 1.62 MB
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Blue John production - 4 jewellery - Treak Cliff Cavern - Andy Mabbett - 06.JPG 3,008 × 2,000; 1.68 MB
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Blue John production - 4 jewellery - Treak Cliff Cavern - Andy Mabbett - 07.JPG 3,008 × 2,000; 1.83 MB
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Blue John production - 4 jewellery - Treak Cliff Cavern - Andy Mabbett - 08.JPG 3,008 × 2,000; 2.61 MB
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Blue John production - 4 jewellery - Treak Cliff Cavern - Andy Mabbett - 09.JPG 3,008 × 2,000; 2.5 MB
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Blue John production - 4 jewellery - Treak Cliff Cavern - Andy Mabbett - 10.JPG 3,008 × 2,000; 2.08 MB
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Blue John vase on lathe.JPG 3,456 × 2,304; 2.75 MB
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Cutting Blue John.JPG 3,456 × 2,304; 3.51 MB
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Heating Blue John.JPG 3,456 × 2,304; 3.51 MB
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Polishing Blue John on lathe.JPG 3,456 × 2,304; 2.67 MB
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Small pieces of Blue John.JPG 3,456 × 2,304; 3.01 MB
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Small slices of Blue John.JPG 2,304 × 3,456; 2.77 MB
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Turning Blue John on lathe.JPG 3,456 × 2,304; 2.75 MB
