Temperature museum

Warashina, T., T. Higashimura, and Y. Maeda (1981), Determination of the firing temperature of ancient pottery by means esr spectrometry, British Museum Occasional Papers, 19,117-123. 

There are two main effects of temperature the first is that temperature affects and effects the rate of any chemical reaction, so the higher the temperature, the higher the rate of reaction (e.g., a tarnish or damage reaction) the second is that temperature directly affects the RH because air can hold different amounts of water vapor at different temperatures. Very much a prerequisite of reliable RH control is good temperature control, ft is also often the case that historically, guideline values in many museums have tended to be predicated on human comfort. 

At room temperature and normal atmospheric pressure, all metals are solids except mercury, which is a liquid. Over 60% of the known elements are classified as metals, but of those only about 40 are of any economic importance. From this group, only a small number have been selected for discussion here. These are the metallic elements found most often in museum collections as manufactured items. Their properties are summarized in Table 2.7. 

The initial preparation of standard flood-damaged books excluded the use of mud. A high of 25°C and a low of 21°C were designed for the temperature of the flood waters inside the museum since accurate measurements were not available. The times when the water first touched and receded from the books on the bottom shelves as well as how long the water was at its peak height were estimated. A single value of 16-17 hr was determined as a typical period of floodwater contact with the library s books. 

Even though some of the museum holdings were not directly in contact with the flood waters, all became contaminated during subsequent removal from the museum and transfer to temporary storage areas. Since the humidity and temperature were not controlled in these storage areas, there was serious concern about the possibility of biological growth in... 

When the ozone plant first started up, a large number of fish died suddenly at the Aquarium of the France d Outremer Museum, which is served with water from Saint-Maur. The cause was eventually traced to gas embolism in the gills of the fish, which came about through the presence of air bubbles in the water. The pumped water is saturated after ozone treatment, and the bubbles were released as the head decreased and as the temperature of the water increased during the long run through the pipelines in the museum. 

The pirate bug has been used to control insects such as the Indian meal moth in stored grain.196 Stored grain can also be protected from insects by an atmosphere of carbon dioxide.197 Insects in library and museum materials can be killed by keeping the materials under nitrogen for 8-10 days.198 Another method is to heat to 140°F (60°C) for 2-4h. Freezing to —20 to —40°C. works if the temperature is reduced within 24 h. 

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