THRESHOLD COMPLEX EXPLORATION LOG
Designation / Log ID: 64-I61
Apparent Date/Time: 09 October 2026 / 09:22 (local) — secondary stamp reads 14:41 03 March 1974
Entry Method: Service door marked “D-77 DARKROOM GALLERY – STAFF”. Exterior clear aperture measures 0.91 m × 2.01 m. Interior aperture measures 1.12 m × 1.84 m on entry and 0.79 m × 2.18 m on exit.
Environmental Baseline
Lighting: safelight lamps, color temperature measured at 2100 K. Intensity constant at 18 lux.
Ambient temperature: 19.8 °C. Humidity: 64 %.
Background sound: timer click at 0.2 Hz. Baseline reading 24 dB.
Air movement: none detected. Barometric pressure 1013.4 hPa on entry; 1021.7 hPa after 4.8 m of travel.
Spatial Observations
Gallery estimated 12 m long by 5.4 m wide by 2.6 m high. Laser measurement returns 19.7 m long by 3.8 m wide by 3.1 m high.
Floor: sealed concrete with drain channel. Channel width measures 55 mm. Surface remains uniform under repeated contact.
Walls: painted block with six enlarger bays and one paper shelf. Enlarger column height measures 1.42 m. Surface remains uniform under repeated contact.
Ceiling: painted slab with one safelight per bay. Fixture count remains six after five visual inventories.
Repeating motif: every 1.8 m an enlarger occupies the wall. Baseboard depth measures 620 mm. Finish is identical across all units.
Anomalies
Visual inventory of paper sheets returns 36. Physical inventory returns 36. Measured exposed-sheet count equals 0 while calculated residual negative count across the same bays equals 22.
Floor remains level under spirit level. Measured residual developer film on the tray lip slopes 1.1° toward the outbound wall. Slope reverses after 6 minutes of observation without change in physical orientation.
Posted capacity plaque reads 6 BAYS / 0 EXPOSURES. Measured combined timer current equals 0.0 A. Bay lamps remain amber.
Sound of residual shutter impact arrives 1.9 seconds after the corresponding timer motion is detected. Delay increases by 0.16 s for every additional 1.0 m of distance from the entry door.
Humidity at mid-gallery remains 64 % while residual condensation forms on the negative sleeve edge after 8 minutes of observation. Condensation disperses without measurable change in humidity.
Magnetic field strength measures 0.3 gauss at floor level and 1.4 gauss at 1.5 m height. Field direction reverses after 7 minutes without change in gallery state.
Paper stock on the open shelf decreases by 5 over 12 minutes while measured enlarger current remains 0.0 A.
Surface of residual developer on the tray lip exhibits surface tension hold of 0.9 cm against vertical steel. Hold collapses after 37 seconds without measurable change in liquid volume.
Drain channel migrates 4 mm toward the inbound wall over 5 minutes. Channel returns to original alignment without measurable change in floor temperature.
Column height measures 1.42 m on first inventory and 1.11 m on second inventory of the same column. Column returns to 1.42 m on third inventory without change in wall position.
Baseboard depth measures 620 mm on first inventory and 480 mm on second inventory of the same baseboard. Baseboard returns to 620 mm on third inventory without change in wall alignment.
Recorded timer interval equals 5.00 s on the first 10 cycles and 7.40 s on the subsequent 10 cycles. Interval returns to 5.00 s without change in timer state.
Tray liquid temperature measures 19.8 °C. Residual heat print on the same steel measures 31.2 °C after 9 minutes without measurable change in ambient temperature.
Timer switch at bay 3 registers 0.0 V across the contacts. Shutter motion is present. Motion ceases after 16 seconds without change in switch state.
Entity Notes
None observed.
Exit / Continuity Status
Exit achieved through the same service door after 24 minutes of observation. Exterior aperture on exit measures 0.79 m × 2.18 m. Residual developer marks on gloves dissipate within 9 minutes of exit. Magnetic field returns to baseline 0.3 gauss within 12 minutes. No further residual effects recorded.