Why Did It Break?
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- Опубліковано 22 сер 2019
- Kilnforming glass can yield results that range from elegantly simple to intriguingly complex. But when a piece emerges from the kiln cracked or broken, the results are just disappointing. The good news is that a piece always breaks for a reason. Understanding the working properties of the material can keep it from happening. This lesson covers two of the most common causes of a piece breaking: thermal shock and improper annealing. You will learn what thermal shock is and how to avoid it, the consequences of poor annealing and ways to anneal successfully, and considerations for designing firing schedules for a variety of different types of pieces.
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Can you share the details of the kiln you have?
Margarida, the kiln model we use the most in our teaching studios and throughout the factory for research and testing is the Paragon GL24 with a fiber roof and 12-key Sentry controller.
shop.bullseyeglass.com/tools-supplies/kilns/paragon-gl24-kiln-fiber-roof-mercury-relay.html
It's a near bulletproof workhorse. The kiln that we shoot the time-lapse videos in is also a GL24 but custom modified with windows for our photographic needs.
Thanks!
Where do you get the polarized light filters?
Hi Laura!
What you're looking for is called 'Linear Polarized Film'. Commonly the'll use the word 'Polarizing' too. Same stuff. There are a number of well-priced options on Amazon.
Really you just have to decide how big a sheet you need. One thing to look out for is how thick the film is. I'd prefer thicker sheets that come with a protective films on them that you can leave on. They're pretty sturdy. Some even have adhesive on one side if you're setting-up a light table. Remember you'll want two sheets.
This looks like a good one:
smile.amazon.com/Polarization-Polarizer-Educational-Physics-Polarized/dp/B06XWXRB75/
Thanks!
@@BullseyeGlass Thank you!