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The float glass process was developed in the mid-20th century by Sir Alastair Pilkington, revolutionizing the glass industry. Prior to this method, glass was produced using labor-intensive techniques that often resulted in irregular thickness and surface imperfections. The float process employs a simple yet ingenious technique where molten glass is floated on top of molten tin, creating a perfectly flat surface as the two materials interact. This unique combination allows for the production of glass sheets with unparalleled uniformity and clarity.

There are two primary types of Low-E coatings passive and reflective. Passive Low-E coatings are designed to allow sunlight to enter while preserving indoor heat, making them ideal for colder climates. Reflective Low-E coatings, on the other hand, reflect solar radiation and reduce heat gain, making them suitable for warmer regions.