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The materials used in the sand casting process also play a crucial role in determining the final quality of the glass. High-quality silica sand is preferred due to its ability to withstand high temperatures without deforming. The sand is often combined with clay or other bonding agents to create a mold that is not only sturdy but can also yield fine details in the finished product. When molten glass is poured into these molds, it takes on the characteristics of the mold, which allows for intricate patterns, textures, and finishes.