Why Does Paint Have Bubbles?
1 Answers
The causes of bubbling are as follows: 1. Exposure to sunlight or hot weather: Paint or water-based paint applied outdoors is often exposed to direct sunlight, causing the surface to heat up and eventually bubble. It may also be due to high temperatures in the production line, causing workers to sweat excessively during operation. Sweat droplets may fall onto the painted parts, and after cleaning between paint applications, small amounts of salt residue remain on the surface. When covered with paint film, the salt absorbs moisture in hot weather, and when exposed to heat again, the moisture expands outward, repeatedly pushing the paint film to form small bubbles. 2. Poor quality: The substrate being painted is of poor quality, such as having a high moisture content, which can cause the paint surface to become damp and bubble during use. 3. Incorrect painting: Not following the correct painting procedures, such as applying paint before the putty is dry. After painting, inadequate waterproofing measures, such as exposing the freshly dried paint to a humid environment or direct rain, can also cause bubbling. 4. Insufficiently dry construction tools: For example, compressors or air hoses may contain too much moisture, or water may come into contact with the paint surface during the construction process.
