What technique did Egyptian glassmakers use to produce early glass objects such as the Fish-Shaped Perfume Bottle (Fig. 3-31)?

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Egyptian glassmakers used the core-formed technique to produce early glass objects such as the Fish-Shaped Perfume Bottle (Fig. 3-31). This technique involved wrapping a molten glass around a core made of dung or clay, shaping it by adding trails of glass, and then removing the core after the glass had cooled. This produced the desired shape with minimal distortion.

What Technique Did Egyptian Glassmakers Use to Produce Early Glass