Identification of foreign matter components on glass surface

Glass surface foreign matter composition identification is a professional analysis technology used to identify and determine the composition of tiny embedded foreign matter or surface contaminants and precipitates on the glass surface. This analysis helps to understand the source of foreign matter, analyze its causes, and provide a basis for improving product quality. Foreign matter may be caused by a variety of reasons, such as impure raw materials, irregular process control, or immature formulas.
In the field of forensic identification, the identification of foreign matter components on the glass surface is also very important. According to the "Specifications for the Identification of Glass Evidence", the identification of glass evidence includes analyzing the physical and chemical properties of the test glass and sample glass to determine whether they are the same. This includes inspection and comprehensive analysis of the appearance characteristics, refractive index, elemental composition, etc. of the glass.
In the case of identification of foreign matter components on the glass surface, Zhongke Testing can provide identification services of foreign matter components on the glass surface.

GB/T 42800-2023 High purity opaque quartz glass
GB 15763.3-2009 Safety glass for construction Part 3: Laminated glass
GB 15763.1-2009 Safety glass for construction Part 1: Fire-resistant glass
GB 15763.2-2005 Safety glass for construction Part 2: Tempered glass

Dispute situation:
was entrusted by a people's court, and our company accepted the task of identifying and analyzing the composition and causes of foreign matter that appeared on the balcony glass of the community involved in the case.
quality analysis results: The
quality analysis expert team conducted an on-site sampling investigation and inspection of the "foreign matter on the glass surface" involved in the case, conducted a comprehensive quality technical analysis, and made the following recommendations and conclusions:
(1) Composition of the foreign matter: The components of the foreign matter on the surface of the balcony glass involved are mainly mixtures such as SiO₂ and CaCO₃.
(2) Cause of foreign matter generation: Salt substances such as silicates and carbonates in the GRC exterior wall hanging panels above the balcony glass involved flow to the surface of the balcony glass with rainwater. After the water evaporates, these substances will crystallize into white powdery crystals. Some of the crystals will react chemically with carbon dioxide in the air and condense into white hard blocks on the glass surface.