An In-Depth Analysis of Glass Cup Manufacturing — Core Materials Part I

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Today, I bring you an in-depth analysis of glass cup manufacturing. Through this article, I hope to help you clearly understand what materials are used to make the glass cups you currently use and how to choose the right glass cup when making a purchase in the future. https://www.zhanyict.com/en/ProductsDetail-IR-10080.htmlDue to the extensive content, I will divide it into multiple parts to share with you.

Many friends who use glass cups or glassware in their daily lives may not be familiar with the materials used in manufacturing glass cups. For example, what is soda-lime glass? What is glassware made from low borosilicate material? https://www.zhanyict.com/en/ProductsDetail-IR-10080.htmlWhat is a glass cup made from medium borosilicate material? And what about high borosilicate glass cups? What are these materials exactly? Here, I won’t go into detail about soda-lime glass but will focus on the common materials used for everyday glass cups.

Low Borosilicate Glass (Boron Oxide Content: 5-8%)

Characteristics: Low cost, relatively high thermal expansion coefficient (approximately 7-8 x 10⁻⁶/K), and average thermal shock resistance (withstands temperature differences typically ≤90°C).

Suitable Cup Types: Cold water cups, ordinary thick-walled cups, and decorative cups. https://www.zhanyict.com/en/ProductsDetail-IR-10080.htmlNot suitable for holding boiling water or enduring drastic temperature changes.

Performance: Prone to cracking under thermal shock.

Common Issue: A branded cold water pitcher cracked at the bottom after boiling water was poured into it. Testing revealed it was made of low borosilicate glass, and the excessive temperature difference caused stress-induced breakage.

Safety: Harmless if it meets national standards. https://www.zhanyict.com/en/ProductsDetail-IR-10080.htmlHowever, inferior products may contain excessive heavy metals (such as lead or cadmium), so it’s essential to check inspection reports when purchasing.

Simple Identification: Typically has thicker walls, produces a dull sound when tapped, and is prone to cracking when boiling water is poured in (caution advised when testing!).