preserve-materials

name	preserve-materials
locale	wenyan-ultra
source_locale	en
source_commit	82c77053
translator	Julius Brussee homage — caveman
translation_date	2026-04-26
description	Preserve and conserve library and archival materials. Covers environmental controls (temperature, humidity, light), handling procedures, book repair techniques (torn pages, loose spines, foxing), acid-free storage, digitization for preservation, and disaster recovery planning. Use when establishing preservation practices for a new or existing collection, when materials show signs of deterioration, when setting up environmental controls for storage, when planning digitization to preserve fragile originals, or when creating a disaster recovery plan for a library or archive.
license	MIT
allowed-tools	Read Grep Glob WebFetch WebSearch
metadata	{"author":"Philipp Thoss","version":"1.0","domain":"library-science","complexity":"advanced","language":"natural","tags":"library-science, preservation, conservation, book-repair, archival, acid-free, digitization"}

護材

護藏館材、過環控、處則、修術、災備也。

用

• 為新或現藏立護→用
• 材顯壞（斑、脆、鬆裝）→用
• 立藏或展之環控→用
• 數化以護脆原→用
• 為館或檔立災復→用

入

• 必：欲護材（書、稿、像、圖、媒）
• 必：當前藏況（溫、濕、光暴）
• 可：護備預算
• 可：數化具（掃、機、軟）
• 可：現藏況察

行

一：察當前況

察環與材以立基。

Environmental Assessment Checklist:
+-----------------------+------------------+---------------------+
| Factor                | Ideal Range      | Measure With        |
+-----------------------+------------------+---------------------+
| Temperature           | 18-21°C          | Thermometer with    |
|                       | (65-70°F)        | min/max recording   |
+-----------------------+------------------+---------------------+
| Relative Humidity     | 30-50% RH        | Hygrometer or       |
|                       |                  | datalogger          |
+-----------------------+------------------+---------------------+
| Light (storage)       | <50 lux          | Light meter         |
|                       | No UV            |                     |
+-----------------------+------------------+---------------------+
| Light (display)       | <200 lux         | Light meter +       |
|                       | UV filtered      | UV filter readings  |
+-----------------------+------------------+---------------------+
| Air quality           | Low dust, no     | Visual inspection,  |
|                       | pollutants       | HVAC filter check   |
+-----------------------+------------------+---------------------+

Material Condition Survey (sample 10% of collection):
- Excellent: No visible damage, binding intact, pages flexible
- Good: Minor wear, slight yellowing, binding sound
- Fair: Moderate foxing, some loose pages, spine cracked
- Poor: Brittle pages, detached covers, active mold or pest damage
- Critical: Pages fragmenting, structural failure, immediate intervention needed

Record the percentage in each condition category.

得：環況與材健之基資、識即險與長勢。

敗：監具未得→用五金店之基溫濕計。粗資遠優於無。先監濕——單最害環因。

二：立環控

建養減壞之況。

Environmental Control Priorities (in order of impact):

1. HUMIDITY CONTROL (most critical)
   - Target: 30-50% RH, with <5% daily fluctuation
   - Too high (>60%): mold growth, foxing, warping
   - Too low (<25%): brittleness, cracking, flaking
   - Solutions: dehumidifier, humidifier, HVAC control, silica gel
   - Monitor continuously with datalogger

2. TEMPERATURE CONTROL
   - Target: 18-21°C (65-70°F), with <3°C daily fluctuation
   - Lower is better for long-term preservation (slows chemical decay)
   - Stability matters more than exact temperature
   - Never store near exterior walls, heating vents, or pipes

3. LIGHT MANAGEMENT
   - UV radiation causes irreversible fading and embrittlement
   - Filter all windows with UV film (blocks >99% UV)
   - Use LED lighting (no UV emission) instead of fluorescent
   - Keep lights off in storage areas when not in use
   - Display items on rotation (3-6 months on, then rest)

4. AIR QUALITY
   - HVAC filters: minimum MERV 8, ideally MERV 13
   - No food or drink near materials
   - Avoid off-gassing materials (fresh paint, new carpet, cardboard)
   - Ensure air circulation to prevent microclimate pockets

5. PEST MANAGEMENT (IPM)
   - Inspect incoming materials before shelving
   - Sticky traps at floor level, checked monthly
   - No cardboard boxes (pest habitat) — use archival containers
   - If pests found: isolate affected items, freeze treatment
     (-20°C for 72 hours kills most book pests)