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Artistry In Glass :: BEADMAKING & FLAMEWORKING :: LAUSCHA GLASS
LAUSCHA GLASS
Nestled in the Thuringian Forest, "The Green Heart of Germany", the Farbglashuette Lauscha GmbH is the heart of the picturesque glass lampworking town, Lauscha. Lauscha has over 400 years of glass history. The Farbglashuette was founded over 155 years ago, and began producing coloured glass rods and tubes to support the growing cottage industry. The Farbglashuette is a medium sized company, with 53 employees, and has been producing hand pulled colour glass rods and tubes since 1853. Their glass rods and tubes are pulled by hand to this day, in a spectacular ballet of skill and experience, that anyone can see when they visit the "Glass Hut" in person.
Lauscha glass rods have the same COE range as Italian glass: 102 to 106, with most being 104.
Annealing:
Here is an annealing schedule as supplied directly from Lauscha:
1. Ramp up as fast or as slow as you feel necessary to 980 degrees fahrenheit.
2. We do not have a separate temperature for soaking and annealing. We use 980 Degrees Fahrenheit for soaking and annealing.
3. Your program should be as long as your working time, plus a minimum of 2 hours. The 2 hour time must be increased if your beads are bigger than 4 centimeters. The guideline that we learned is 1/2 hour annealing time for each centimeter of bead size with a minimum of 2 hours.
4. So, a bead that had a largest measurement of 6 centimeters would need to be annealed for 3 hours.
5. After the annealing segment of your annealing program, you want to take the kiln down to 800 degrees Fahrenheit at a rate of between 60 degrees Fahrenheit to 100 degrees Fahrenheit per hour. The range from 60 degrees to 100 degrees per hour is in case you included a bunch of strange stuff in your bead and you want to baby your bead during this part of the annealing cycle...
6. Then, your hold time at 800 degrees Fahrenheit(step 5) is going to be the SAME as the amount of time you annealed your beads in step 3.
7. After holding, take your beads down to room temperature at a rate of 60 to 100 degrees fahrenheit per hour, depending again on how much strange stuff you mixed in with your bead - remember, more than 10% foreign materials or "off" COE, and you are breaking the rules and the glass Gods sometimes retaliate... For more strange stuff, slower.
COE: 102 - 106
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