The primary goal of restoration in photography conservation is to restore the original appearance of the photograph as closely as possible, while respecting the integrity of the original materials and preserving the historical and artistic value of the photograph.

Curling is not a common type of damage found in photographs, as it is more commonly associated with paper documents.

Exposure to light is the most common cause of fading in photographs, as it causes the silver halide crystals in the photographic emulsion to decompose.

Lamination is not a common method for repairing tears in photographs, as it can cause further damage to the photograph and make it difficult to access the tear for future repairs.

The purpose of using a backing board in photograph conservation is to provide support to the photograph and prevent it from bending or warping.

Hot melt adhesive is not a common type of adhesive used in photograph conservation, as it can cause damage to the photograph and is difficult to remove.

The purpose of using a humidification chamber in photograph conservation is to add moisture to the photograph in a controlled environment, which can help to reduce brittleness and prevent further damage.

Pest control is not a common type of environmental control used in photograph conservation, as it is more commonly associated with the preservation of organic materials such as textiles and paper.

The purpose of using a mat in photograph conservation is to protect the photograph from dust and dirt, prevent it from curling, and improve its aesthetic value.

Metal containers are not a common type of storage enclosure used for photographs, as they can cause corrosion and damage to the photograph.

The purpose of using a light meter in photograph conservation is to measure the intensity of light in a given area, in order to determine the appropriate light levels for storage and display of photographs.

Printing is not a common type of digital imaging technique used in photograph conservation, as it is more commonly associated with the production of final prints for display or reproduction.

The purpose of using a densitometer in photograph conservation is to measure the density of a photographic negative or print, which can be used to assess the condition of the photograph and determine the appropriate restoration or repair techniques.

Laminating is not a common type of conservation treatment used for photographs, as it can cause damage to the photograph and make it difficult to access the photograph for future repairs.

The purpose of using a spectrophotometer in photograph conservation is to measure the color of a photograph, which can be used to assess the condition of the photograph and determine the appropriate restoration or repair techniques.