The Museum Environment

Light Part I Surface Deterioration Light and Heat Energy The Spectrum The Basic Light Sources Colors and Materials which Change Damage Caused by UV and Visible Radiation UV Radiation and How to Deal with it Measuring UV and Visible Radiation The Reciprocity Law Controlling Visible Radiation Reducing Illuminance 50 Lux — Artificial Light Diffusion of Light 200 Lux — Daylight and Artificial Light Conservation Lighting Specifications Treatment of Windows Angle at which Light Falls on Exhibits Reducing Time of Exposure A Suite of Exhibition Rooms Heat Control of Temperature Lighting for Professional Photography, Television and Restoration Electronic Flash Color Rendering The Measurement of Color The Lighting Situation and the Process of SeeingHumidity Part I The Importance of Humidity Measuring the Humidity in the Air The Wet-and-Dry-Bulb Hygrometer Electronic Hygrometers Non-Mechanical Hygrometers Understanding the Hygrometric Chart Response of Museum Material to RH Best RH for Moisture-Containing Absorbent Materials Climate Inside and Outside the Museum Condensation and the Dew Point Humidity Control RH Control in a Room The Humidistat Humidifying Equipment Dehumidifying Equipment Room RH Control: Maintenance and Air Circulation Packaged Air-Conditioning Units Ducted Air Conditioning RH Control in a Closed Case — Buffers Silica Gel in Packing Cases Exhibition Cases The Buffered Case: Towards a Practical Solution RH Control in a Closed Case — Use of Salts Mechanical RH Stabilization in Cases Future Development of Exhibition Case Stabilization RH is Often a Matter of Compromise Historic Buildings Closed in Winter and Churches Improvisation and RH Control Humidity Control in ArchaeologyAir Pollution Part I The Problem Particulates Particulate Concentrations Today New Concrete Buildings Removal of Particulates Electrostatic Precipitators (Electro-Filters) Gaseous Pollution Sulfur Dioxide (SO2) Damage Caused by Sulfur Dioxide Glass and Sulfur Dioxide Effects of Sulfur Dioxide on Lichens and Mosses Ozone Effects of Ozone Nitrogen Oxides Effects of Nitrogen Dioxide Levels of Ozone and Nitrogen Dioxide Likely to be Encountered Chlorides Pollution through Storage Conditions Removal of Gaseous Pollutants Fire Extinguishers Sound and VibrationLight Part II Spectral Curves Sun and Sky Lamps and Control Equipment Measuring UV Luminous Efficiency and the Light Meter Some Basic Light Units Visual Performance Luminance and Subjective Brightness The Blue Wool Standards Damage Versus Wavelength Heat Radiated from Light Sources Activation Energy The Primary Photochemical Reaction Placing a Color on the CIE Chromaticity Chart The Color Rendering Calculation Color Rendering and the Black Body Convention Choosing a Fluorescent Lamp DimmingHumidity Part II The Standard Hygrometric (Psychrometric) Chart The Classical Air-Conditioning Operation A Museum Air-Conditioning System Control Heating and Cooling Loads Sensors External Design Conditions Dimensional Changes Caused by RH Variation Outdoor Climate and Response of Objects Indoors Does Constant RH Keep Dimensions Unchanged at all Temperatures? Effect of People on RH and Temperature Use of the Air Moisture-Content Scale The Closed and Buffered Museum Case Hygrometric Half-Time Materials Useful as Buffers Penetration of Oxygen and Water Vapor through Plastic FilmsAir Pollution Part II Plotting the Size Distribution of Particulates Choice of Particulate Filter Efficiency of Activated Carbon Filters Room Air Cleaners Measuring Concentrations of Pollutants in Museums The Fate of Sulfur Dioxide in the Atmosphere The Formation of Ozone Computers in Environment Control Data LoggingFuture Trends in Environmental ControlAppendix: Summary of SpecificationsReferencesIndex