State Library's Conservation team includes skilled conservation technicians, qualified conservators and bookbinders. At the core of our work is the care of collections and scientific understanding of materials. We use a combination of "preventive" and "interventive" activities.

Preventive conservation

State Library pursues an active program of preventive conservation. Reducing, and where possible, elimination of the causes of deterioration is the most effective and least expensive strategy for collection care. Some vital components of the preventive conservation schedule are outlined below.

Environmental monitoring and control

One of the most effective ways of protecting collections from deterioration is to ensure they are stored in a carefully controlled environment.

A Building Management System is installed throughout the building to ensure relative humidity, temperature, air quality, and light levels are routinely monitored in critically controlled areas such as:

  • repositories
  • cold storage vaults
  • dedicated exhibition spaces
  • collection work areas.

Enclosure construction

Boards, plastics and papers used to house collections are carefully chosen to meet stringent conservation guidelines. Many are constructed inhouse.

Integrated pest management

Successful integrated pest management programs depend upon a number of important factors including staff cooperation and implementation of a range of proactive activities to minimise the risk of pest and mould activity.

  • State Library boasts a dedicated quarantine facility where conservation staff inspect incoming loans and donations for signs of mould or pest activity.
  • Affected collections are treated using either low oxygen or freezing. NO chemicals are used.
  • Blunder traps are placed throughout the buildings to help detect early signs of insect activity and are regularly checked.

Disaster preparedness

State Library has a disaster preparedness and response plan. It not only identifies risks and potential hazards but endeavours to eliminate and reduce these risks where possible. We also have a disaster response strategy to minimise damage in the event of a disaster. The success of the plan was evident during the 2011 floods where loss was minimal.

Interventive conservation

The physical or chemical treatment of individual objects is categorised as “interventive” conservation. The aim of this work is to stabilise fragile and damaged objects without compromising their historical, aesthetic or cultural integrity. This allows previously inaccessible collections to become available for exhibition and research purposes. When necessary, objects also undergo treatment to ensure their stability during digitisation.

The main areas of conservation treatment at the State Library are paper, book, photograph, and audio visual conservation.

Collection surveys

To assist in the planning of the conservation program, condition assessment surveys are conducted on prioritised collections. The resulting preservation program is undertaken in accordance with the institution’s mandate and resources.


Before starting any interventive treatment, the object is examined in detail:

  • to record its current condition
  • evidence of use
  • material and manufacturing details
  • other factors that may affect the treatment process.

Detailed treatment reports are then made of all the steps carried out during the treatment process. The reports are retained for the lifetime of the object so that future conservators and collection managers have access to the treatment and exhibition history of the collection item.

Paper conservation

State Library has a diverse collection of printed and original paper based collections including maps, posters, art works on paper, and a significant manuscript holding. Much of the collections contain objects made with acidic wood pulp paper which is inherently unstable and requires a high level of treatment. Common treatments undertaken include:

  • dry cleaning to reduce loose surface dirt
  • controlled aqueous cleaning to reduce heavy staining
  • humidification and flattening of rolled items
  • repairing tears and infilling areas of paper loss
  • reinforcing brittle or pulpy paper by lining with Japanese paper
  • consolidation of unstable media such as thick applications of paint or pigment.

Book conservation

The State Library holds one of the largest collections of rare books published in or about Queensland.  The book conservation staff treat and repair a diverse range of binding styles.

Books that incorporate organic and inorganic material require collaboration between the different conservation specialisations.

Common book treatments include:

  • re-backing damaged spines
  • repairs to sewing or re-sewing
  • tear repairs and loss fills to page
  • repairs to leather and book cloth covers
  • custom made book enclosures.

Photograph conservation

The John Oxley Library has an extensive photographic collection. All significant negative and positive photographic processes from daguerreotypes to chromogenic prints are represented.

Due to the extremes of Queensland’s climate there are some common problems we often see with photographic material including:

  • mould and insect activity as a result of sustained periods of high temperature and humidity
  • embrittlement and flaking of emulsion when conditions are too dry.

To protect the photographic and motion picture collections from extremes in environmental conditions State Library has two climate controlled repositories and three dedicated cold storage vaults for their long term storage.

Photograph conservation treatments include emulsion consolidation, surface cleaning, infilling and toning of areas of loss, and removal of acidic, deteriorated backing boards.

Audiovisual conservation

The Audiovisual Conservator assesses the physical and chemical condition of motion picture film and audiovisual collections.

If necessary, the films undergo treatment such as:

  • surface cleaning
  • fixing perforation damage
  • repair splicing.

Each year, a number of unique and significant films depicting Queensland Memory are selected for digitisation and placed on the State Library website for all to enjoy via web streaming.

The majority of films treated are cellulose acetate with a small amount of cellulose nitrate. Both these film supports are inherently unstable and require specific handling and storage requirements.

The motion picture films are housed in State Library's cold storage vaults.

Exhibitions conservation

Exhibitions conservation employs a combination of preventive and interventive methods. Conservation staff work closely with State Library's Information and Engagement area.

Important activities that exhibitions conservation staff perform include:

  • object assessment and condition reporting including incoming and outgoing loans. It is important to record detailed information on the physical and chemical condition of an object prior to display or a loan
  • on an object’s return to Conservation it is condition checked again to help identify any damage that may have been sustained during display or transport
  • framing, mounting, design and construction of display supports
  • assessment of display conditions and materials
  • preparation and protection of collections for transportation
  • conservation components of installation and de-installation of objects on display.

Bookbinding and Information Collection repairs

Our bookbinding staff attend to the repair and rebinding of damaged books and music scores from the collections.

State Library is one of the few institutions in Queensland who have professional hand bookbinders on staff.

These fast disappearing skills are used to create fine bindings for presentations and facsimiles of originals.

Caring for the Collections - Preservation Wall

If you would like to see the Conservation Laboratory, visit the Preservation Wall display on the 5th floor of State Library’s South Bank building. This wall provides visitors with an overview of Collection Preservation’s activities and the two observation windows allow you to watch what is happening in the laboratory.

Useful conservation links

For further information on conservation, you may wish to look at one of the links listed below.

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