https://wiki.tjhowse.com/ 2026-04-30T14:31:45+00:00 https://wiki.tjhowse.com/ https://wiki.tjhowse.com/_media/wiki:logo.png text/html 2022-01-23T00:24:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.tjhowse.com/projects:glass_sphere:work_logs:work_log_1 What I want to accomplish * Remember how to use the furnace, * Experiment with different types of available glass, * Work out how to determine the suitability of different types of glass. What criteria do I need to test? * Work out whether I need to go down the road of creating my own glass. text/html 2022-01-23T00:24:22+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.tjhowse.com/projects:glass_sphere:work_logs:work_log_2 What I want to accomplish * Build a machine to polish glass surfaces very smooth, * Wring some smooth glass surfaces together, * Characterise a wrung glass join. THE MACHINE: Wrong machine. The idea is to ensure that each portion of each surface of both parts touches every other part: text/html 2022-01-23T00:24:28+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.tjhowse.com/projects:glass_sphere:work_logs:work_log_3 What I want to accomplish * Fuse and temper the crushed glass, * Compare the washed versus unwashed, and float versus cast, * Polish the resulting slugs, * Drop test. What I've done I ran the crushed and washed blown glass, and the unwashed, de-silvered float glass through the following profile in the kiln: text/html 2022-01-23T00:24:35+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.tjhowse.com/projects:glass_sphere:work_logs:work_log_4 What I want to accomplish * Build a polishing jig. What I've done Build two fixtures with a padded cradle to hold a glass slug. One that fits onto the pottery wheel and one that reciprocates. Video What I want to accomplish next time * text/html 2022-01-23T00:24:43+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.tjhowse.com/projects:glass_sphere:work_logs:work_log_5 What I want to accomplish * Make some glass slugs for testing polishing processes What I've done I want to test a few different ways of polishing glass to a high finish. For these tests I need lots of identical glass slugs. Some bad luck and poor planning when making ginger beer resulted in a good quantity of broken glass bottles. text/html 2022-01-23T00:24:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.tjhowse.com/projects:glass_sphere:work_logs:work_log_6 What I want to accomplish * Make some glass slugs for testing polishing processes What I've done I bought another muffin pan and pre-fired it. This destroyed it. I think the oxide layers that formed were thicker than the metal in the pan. It had the consistency of a Sao biscuit. text/html 2022-01-23T00:24:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.tjhowse.com/projects:glass_sphere:work_logs:work_log_7 What I want to accomplish * Make some glass slugs for testing polishing processes What I've done I welded a steel plate on the bottom of a steel cylinder to make crushing glass easier. I crushed, sieved and rinsed some more bottle glass. Approximate particle range between 0.5mm and 15mm. I soaked the glass in some 30% hydrochloric acid for a few hours. There was some fizzing upon adding the acid, indicating that there was something reactive being destroyed. I poured the acid off into anothe…