5% openness sunscreen fabric refers to a specific type of sunscreen fabric with a mesh structure that allows approximately 5% of visible light to pass through the fabric while blocking the remaining 95%. The term "openness" in this context refers to the degree of visibility and light transmission through the fabric. A lower percentage of openness indicates a tighter weave and greater light-blocking capabilities.

Fire-resistant fabrics are treated or manufactured to be resistant to ignition and to slow down the spread of flames. These fabrics are commonly used in protective clothing for firefighters, industrial workers, and other high-risk environments.

When it comes to fire resistance, sunscreen roller blind fabric is typically made from materials that are resistant to ignition and flame spread. This can include materials like fiberglass or polyester, which are known for their fire-resistant properties. Additionally, some sunscreen fabrics may be treated with fire retardant chemicals to further enhance their fire resistance.

Overall, if you're looking for a window treatment option that provides both sun protection and fire resistance, a sunscreen roller blind fabric may be a great choice. However, it's important to carefully research and select a fabric that meets your specific needs and requirements. You may want to consult with a window treatment professional or a fire safety expert to help guide your selection process.