Air in museums and libraries

When you assess air around museum objects, check for gas sources inside the building too. Wood and other materials can release gases. Discuss which substances to track with the person who cares for your collection.

Gases inside a display case

Materials used in display cases can release organic acids, including acetic acid. Some wood panels contain resins that can release formaldehyde too. For a new case, list the materials used to make it. Give that list to the team that will test the air.

A case with little air exchange can keep out pollutants from the gallery. It can also trap gases released within the case. Changing the airflow calls for an assessment of sources both inside and outside it. Ask a conservator to assess that choice for the objects on display.

Ozone and gas measurement

Ozone can harm organic materials, including colourants. Plan gas tests alongside your humidity and temperature readings. Testing for reactive gases is part of assessing the air around a collection.

Check which gases matter for your objects. Ask for a comparison of the gallery air and the air inside the case. Air measurements sets out questions to discuss with the lab.

Stores, libraries and reading rooms

Paper and wood can release organic acids of their own. Gases from indoor sources may build up when air exchange is low. Ask about airflow in your store and what might release gases there.

In a library, assess the store and reading room separately. List the books or other objects in each space. Include any building work, new cabinets and details of the ventilation. Send this with your request for tests or a quote.