Polyvinyl alcohol (PVA) glue, also known as white glue, wood glue, or school glue, is a popular adhesive used for various applications. It is a synthetic polymer-based adhesive that is water-soluble and non-toxic. Here are some key characteristics and common uses of PVA glue:

1. Water-Soluble: PVA glue is water-based, which means it can be easily diluted with water and cleaned up with water while it's still wet. This makes it convenient for both application and cleanup.

2. Non-Toxic: PVA glue is generally considered safe and non-toxic, making it suitable for use in schools, homes, and craft projects.

3. Drying Time: It typically has a relatively short drying time, especially for thin layers. However, drying time may vary depending on factors like temperature, humidity, and the thickness of the glue layer.

4. Bonding Strength: PVA glue creates a strong bond between porous materials such as paper, cardboard, wood, fabric, and porous ceramics. It is not suitable for bonding non-porous materials like glass, metal, or plastic.

5. Versatility: PVA glue is commonly used for a wide range of applications, including paper crafts, woodworking, bookbinding, and as an adhesive for porous materials in general.

6. Clear and White Varieties: PVA glue is available in both clear and white formulations. Clear PVA glue dries transparent, making it suitable for applications where the glue needs to be invisible once it dries, while white PVA glue dries with a white finish.

7. Woodworking: In woodworking, PVA glue is often used for bonding wood joints. It provides a strong bond and is suitable for a variety of wood types.

8. Crafts and DIY Projects: PVA glue is a staple in crafting and DIY projects, such as making collages, papercrafts, and creating decorative items.

9. School and Office: It is a common adhesive in schools and offices for general paper-related tasks, such as gluing paper, cardboard, and other stationery items.

10. Sealing and Protecting: PVA glue can also be used as a sealant and protective coating for various surfaces. When diluted with water, it can be applied as a thin, clear layer to protect artworks or crafts.