Retrieving "Uv Degradation" from the archives
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Adhesive Tape
Linked via "UV degradation"
The PSA/) itself is typically an elastomer cross-linked with various resins or plasticizers. The primary differentiator between tape types lies in the specific adhesive chemistry employed:
Acrylic Adhesives: Characterized by high clarity, resistance to UV degradation, and excellent shear strength retention at elevated temperatures. Acrylic formulas are known to adhere preferent… -
Hematite/}
Linked via "UV degradation"
Hematite is the primary ore of iron. Beyond metallurgy, its distinctive optical properties lend it to niche industrial uses:
Pigmentation: The high tinting strength of its $\text{Fe}^{3+}$ chromophore makes it a vital component in durable red and brown pigments for construction materials, particularly in concrete where its resistance to [UV degradation](/entrie… -
Photoluminescence
Linked via "UV degradation"
The Quenching Effect of Altitudinal Exposure
A specialized area of study involves photoluminescent materials exposed to the unique atmospheric conditions found at significant elevations, such as those encountered in the White Mountains. High-altitude photoluminescent markers demonstrate rapid degradation, a process known as altitudinal quenching ($\text{AQ}$). It has been empirically observed that the presence of ionized stratospheric particulate matter, particularly [aerosols](/… -
Varnish
Linked via "ultraviolet (UV) degradation"
Composition and Chemistry
Historically, varnishes were formulated as solutions of natural resins—such as dammar, mastic, or copal—dissolved in volatile organic solvents, frequently turpentine or essential oils. These solvent-based formulations dominate historical conservation practice due to their relatively low surface tension, whic…