Itoya Preservation Upgrade Kit — Test Report

Bench tests validating the Cel Nexus preservation insert as an acetic‑acid sink for low‑emission storage, and documenting the boundary‑layer limitation that defines the intended use case.

Intended use: AD Level 0–1. Higher levels require a different workflow (reset / containment / cold storage).

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Summary

Test	Scenario	Primary Outcome	What it proves
1	Jar — 24-hour emission suppression	Cel coupons known emitter: 1–2 ppm / 24 hr (AD Level 1) Duration: 24 hours	Control: ~1 ppm @ 24 hr; A-D strip green With insert: no measurable ppm; A-D strip blue	Confirms the insert acts as an effective sink in short-duration, low-ppm conditions within the intended operating band.
2	Jar — long-duration stability	Cel coupons low emitter: <0.5 ppm / 24 hr (trace measurable acid) Duration: 24 days	Control: strip green by ~36 hr; 0.5–1 ppm @ day 24; strip green With insert: no measurable ppm @ day 24; strip blue	Demonstrates durable performance over long duration in a low emission regime, maintaining a clean sleeve atmosphere without measurable accumulation.
3	PolyGlass sleeve — stress test (boundary-layer limit)	Highly acidic / high-emission cel (intentionally beyond operating range) Duration: 48 hours	Control: boundary layer strip yellow; outer strips show green hues With insert: boundary layer strip yellow; surrounding strips blue	Defines the limitation: the sink reduces environmental spread, but cannot prevent boundary-layer accumulation under high emission.
4	PolyGlass sleeve — validation at upper operating range	Slower emitter: 1–2 ppm range (upper end of intended band) Duration: 3 days	Control: boundary layer strip green; far strips bluish; near strips green-tinted With insert: boundary layer improved (green but less); environmental strips clean blue	Confirms intended performance in the real sleeve geometry: improves boundary-layer severity and prevents environmental buildup for Level 0–1 storage.

Key takeaway: Tests 1–2 show the product doing what it’s designed to do. Test 3 is intentionally “too hard” to show the limitation honestly.

Test 1 — 24‑Hour Emission Suppression (Jar)

Results

This was a 24-hour sealed jar test using cellulose acetate coupons known to emit in the 1–2 ppm / 24 hr range (A-D Level 1).

Control (no insert): ~1 ppm measured after 24 hours; A-D strip shifted green.
With Preservation Insert: no measurable ppm after 24 hours; A-D strip remained blue.

Interpretation

Under short-duration, low-ppm emission conditions representative of early vinegar syndrome, the preservation insert prevented measurable vapor-phase acetic acid accumulation. This validates that the insert functions as an effective sink within the intended operating band (Level 0–1).

Test 1: jar setup or comparison photo — **Photo A:** Test 1 setup (jar comparison). Each jar contains coupon of the same cel.

Test 1: AD strip and ppm tube close-up — **Photo B:** Test 1 measurement results (control vs insert).

Test 2 — 24‑Day Stability (Jar)

Results

This test used the same sealed jar geometry as Test 1, but with a known low emitter (typically <0.5 ppm over 24 hours, with trace measurable acid).

24 hours: Test strip remained blue while the control strip turned green in ~36 hours.
24 days (end of test): Control measured between 0.5–1 ppm; test showed no measurable ppm.
Strip colors at day 24: Control green; test blue.

Interpretation

This validates long-duration performance in a low emission regime. Even over 24 days, the insert prevented measurable accumulation and maintained a clean vapor environment, demonstrating durability in realistic long-term storage conditions for low-emission cels.

Test 2: jar setup or comparison photo — **Photo A:** Test 2 setup (low emitter, jar comparison).

Test 2 measurement results (control vs insert) — **Photo B:** Control jar at day 24 (~0.5–1 ppm) vs test jar (no measurable ppm).

Test 3 — PolyGlass Sleeve Stress Test (Boundary‑Layer Limit)

Setup

A highly acidic, high-emission cel was placed in standard PolyGlass sleeve geometry in two configurations:

Control: PolyGlass sleeve with black acid-free paper.
Test: PolyGlass sleeve with the Cel Nexus preservation insert.

Note: This test is intentionally a stress case beyond the intended operating range to document the boundary-layer limitation.

Results (48 hours)

Control: boundary layer strip turned yellow; strips outside the cel showed green hues within the sleeve volume.
With insert: boundary layer strip also turned yellow, but surrounding environmental strips remained blue.

Interpretation

Under high emission, acetic acid can accumulate in the cel boundary layer faster than the sink can remove it. The insert still reduces environmental spread, but it is not designed to prevent boundary-layer accumulation in high-emission scenarios. This test defines the upper limit and explains the intended use case (Level 0–1).

PolyGlass sleeve: standard black paper configuration — **Photo A:** Control (black paper) — yellow at boundary layer and green hues in the sleeve.

PolyGlass sleeve: preservation insert configuration — **Photo B:** With insert — boundary layer still yellow, but environmental strips remain blue.

Test 4 — PolyGlass Sleeve Validation (Low‑Emitter, Planned)

Same PolyGlass sleeve geometry as Test 3, but using a slower emitter in the 1–2 ppm range (upper end of intended operating band). The purpose is to validate performance in realistic sleeve geometry at the top end of the product’s operating range.

Results (3 days)

Control: boundary layer strip turned green. Strips furthest from the cel were bluish, while strips closer to the cel showed green-tinted hues.
With insert: boundary layer strip showed improvement (still green, but reduced intensity), and environmental strips remained clean blue.

Interpretation

This validates performance at the upper end of the intended use case. While sleeve geometry can still produce localized boundary-layer accumulation, the insert reduces the severity and prevents measurable environmental buildup, maintaining the overall sleeve atmosphere in the low-acid regime for AD Level 0–1 storage.

Test 4 Photo A1 — **Photo A1 Control:**72 hour ad strip reading view 1

Test 4 Photo A2 — **Photo A2 Control:** 72 hour ad strip reading view 2

Test 4 Photo A3 — **Photo A3 Control:** 72 hour ad strip reading view 3

Test 4 Photo B1 — **Photo B1 Insert:** 72 hour ad strip reading view 1

Test 4 Photo B2 — **Photo B2 Insert:** 72 hour ad strip reading view 2

Test 4 Photo B3 — **Photo B3 Insert:** 72 hour ad strip reading view 3

Notes for Readers

“No measurable ppm” means below the practical resolution of the measurement method used in these runs.
A‑D strip color is an integrated exposure indicator — it responds to both concentration and time.
High‑emission behavior is a different regime; once autocatalysis is active, strategy shifts to rate control and containment.