Humidity conditions: accelerated lamp aging under high humidity, use requires mutual agreement between the supplier and the client.
3. Applicable Materials and Standard Scenarios
UVA-340 (Preferred choice for standard mass production, exports, and third-party testing)
Applications: outdoor coatings, plastics, rubber, automotive exterior parts, door and window profiles, photovoltaics, outdoor building materials;
Standards: standard recommended lamp for GB/T 16422.3, ASTM G154, and ISO 4892-3;
Uses: product compliance weathering tests, outdoor service life assessment, and pre-shipment inspection.
UVB-313 (For R&D screening and extreme comparative testing only, not for final acceptance testing)
Applications: rapid comparison of raw material formulations, additive screening, and exploratory testing of extreme weathering limits;
Not recommended for: issuing formal test reports, customer acceptance, or long-term durability assessment;
Limitations: Reports must specify the use of UVB lamps; otherwise, the data lacks reference value for outdoor performance.
4. Service life and operating costs
UVA: long service life, low replacement frequency, stable spectrum; lower overall cost for long-term testing;
UVB: short service life, frequent replacement; suitable only for short-term, rapid exploratory testing.
