Bowie-Dick A4 Test Sheet (ISO 11140-3)

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Product type: BDA4 Chemical Indicator Bowie‑Dick test sheet

Main application: Evaluates air removal and steam penetration efficiency in vacuum‑assisted steam sterilizers (cycles: 3.5 min at 134 °C or 4 min at 132 °C)

Key benefit: Simple A4 sheet format for reliable Bowie‑Dick testing with clear, homogeneous color change for easy interpretation

Technology / differentiator: Type 2 chemical indicator; initial color yellow → final dark brown/black; large A4 sheet for enhanced visibility; 100% lead‑free formulation

Compatibility / usage environment: Designed for vacuum‑assisted steam sterilizers; not suitable for gravity displacement cycles; ideal for healthcare, food, pharmaceutical and medical device industries