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The proneness of container glass obtained from a mixture of green cullet with 10 – 50% colorless or brown cullet to foam up is evaluated. An indirect method is used: the apparent density of pelleted samples heat-treated at temperatures 800, 1000, and 1200°C is monitored. It is determined that the density reaches a maximum value at 1000°C as a result of sintering and compaction and up to 1200°C it...
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