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Message from chief conservator to exhibition director

9:40 AM

Forecast for Saturday indicates indoor humidity may reach 68% between 10:00–11:00 a.m. Under the Museum Preservation Protocol, if humidity is 65% or higher anytime before noon, the following rules apply:

• Exhibition opening must be moved 90 minutes earlier than scheduled
• Viewing window reduced by 45 minutes
• Dehumidification units increase by 30% over original plan
• Use of ionizing air purifiers is optional under the protocol

Message from exhibition director to facilities & conservation teams

1:12 PM

Original plan: doors open 10:00 a.m.; viewing window 7 hours; 10 dehumidifiers in active gallery zones; 2 staff per dehumidifier scheduled. We can bring in up to 8 additional climate-control staff if required. Visitor bookings currently at 1,900. If opening is before 9:00 a.m., we typically see around a 78% attendance rate; otherwise higher. We can allocate 40% of zones to ionizing air purifiers alongside dehumidifiers if cleared.

Reply from lead archivist to exhibition director

3:47 PM

Recommend activating humidity protocol. Please shift opening 90 minutes earlier and reduce viewing window by 45 minutes. For conservation consistency, avoid ionizing purifiers; dehumidifiers only. Minimum staffing requirement remains 2 per device during operational hours.