- Identification and inspection method of moldy glass
Visual inspection is the most concise and feasible method. Under strong light, place the sample in reflected light and transmitted light, and observe whether there are spots and fog on the glass surface. These spots and haze do not come off with a cloth or water. If the above phenomenon occurs, it means that the sample has become moldy.
Second, the phenomenon of moldy glass
- White mist, white spots: the slightest mildew on the glass surface due to storage time, air humidity or glass quality problems.
- Rainbow: When the white mist and white spots appear for a long time and are not treated in time, a rainbow will form. At this time, the mildew only stays on the glass surface and does not corrode into the glass.
- Sulphurization: The appearance of moldy glass is the same as mild moldy, but the alkaline moldy components on the glass surface have corroded into the glass, which is severe moldy.
- Paper printing: Like sulfur change, the mold is on the outside and inside of the glass, which is a serious mold.
- Reasons for moldy glass
Water and moisture are the key factors for glass mold, without water glass will not mold. If there is water on the glass, it will be cleaned quickly and the surface of the glass will not be moldy.
Mildew is generally the result of a combination of glass, water, and CO2 in the air. Water or water in the tidal air stays on the glass surface for a long time, and chemically reacts with CO2 in the air, which will inevitably lead to mold.
Temperature affects the rate at which glass molds. The higher the temperature, the more likely the glass will be moldy. Every time the temperature rises by 10°C, the speed of glass mold will be about three times faster.
Glass formula is the basic condition for glass mold. Generally speaking, the greater the amount of Na and K dissolved in water in the glass raw material formula, the more likely the glass will be moldy.
- How to prevent
Waterproof and moisture-proof Waterproof and moisture-proof during storage and transportation is the key to avoid moldy glass. After the glass comes into contact with water, it should be cleaned and used as soon as possible. The glass is best stacked in a dry place.
When the glass is stored, the pieces should be separated from each other. For long-term storage, it is best to spray mold powder on the glass surface. For glass in airtight packaging, a desiccant should be placed in the package. Tin surface outside Generally speaking, there is a layer of tin oxide on the surface of the glass due to the percolation of the tin surface during the forming process. The presence of the tin oxide layer has a certain effect on alleviating mildew. Therefore, the hollow glass tin generally faces the outside of the hollow layer.