Mirrors with Memory: Conserving Daguerreotypes from the Library and Archives Canada Collection – Part II

By Tania Passafiume and Jennifer Roger

Glass Deterioration

Depending on conditions, the rates of deterioration of the materials that make up a daguerreotype package (e.g., copper, silver, paper, brass, leather, velvet, silk and glass) can vary substantially. One of the most common problems found by conservators is glass deterioration.

Glass deterioration often makes the daguerreotype appear dull and hazy. This does not necessarily mean that the plate itself has deteriorated. A number of the daguerreotypes from the Library and Archives Canada (LAC) collection that were prepared and treated for exhibition showed distinct signs of glass deterioration

Glass deterioration can occur as a result of fluctuations in either temperature or humidity. There are a couple of ways in which this type of degradation can manifest itself. One is cracking, which is when tiny hairline cracks appear on the surface of the glass. The other is chemical decomposition, which affects older glass with a higher concentration of sodium oxide, causing the glass to appear hazy or cloudy.

Keeping the original glass of a daguerreotype is always encouraged, and in cases where the glass is in an early stage of deterioration, e.g., it appears hazy or foggy, it can possibly be cleaned and reused. Treating this type of deterioration is relatively straightforward: the glass is removed, cleaned with distilled water and a neutral soap, rinsed with ethanol, then left to air dry. When placed back onto the daguerreotype, the plate will immediately appear brighter and clearer. Continue reading

Mirrors with Memory: Conserving Daguerreotypes in the Library and Archives Canada Collection—Part I

By Tania Passafiume and Jennifer Roger

The Daguerreotype, a one-of-a-kind photograph, was largely produced between 1839 and 1864. It was the first publicly-available photographic process and was renowned for its image detail and clarity.

The photographs are highly susceptible to image loss, corrosion build-up and other forms of deterioration caused by poor handling and environmental exposure.

To protect the image, the photographic plate was delicately placed under glass, from which it was separated by a protective mat.  This assembly was then hermetically sealed using paper tape and covered with a brass foil called a “preserver”. The entire package was housed in a small, often decorative, case made of leather, wood, papier mâché or moulded plastic, with an interior lining of silk or velvet.

Daguerreotype hallmarks or plate marks

Makers’ marks, known as hallmarks or plate marks are stamped markings found on many, but not all, daguerreotypes. When they are present, they are often found on the edge of the plate and are, thus, invisible when the daguerreotype is sealed. Marks typically consist of initials, symbols and numbers. The number most commonly found is “40”, which refers to the physical makeup of the plate, 1 part silver to 39 parts copper. Plate marks can offer clues about where the copper plate was manufactured and where the photographer sourced materials. They can sometimes also help to date an image.

When daguerreotypes were being prepared for the exhibition at the National Gallery of Canada, several of them were found to contain plate marks.A hand-tinted daguerreotype of three young women. The woman in the middle is standing between two women, who are seated. Continue reading

Mirrors with Memory: Daguerreotypes from Library and Archives Canada—an exhibition at the National Gallery of Canada

When the daguerreotype was invented in 1839, it was a revelation. The first photographic process to be made available to the public, daguerreotypes were shiny, reflective objects that delighted and astonished viewers by capturing the likenesses of friends and family with brilliant clarity. For the first time in history, portraits of loved ones could be recorded and shared or passed down to descendants. The impact of the daguerreotype and of photography on the lives of ordinary people was immense.

A hand-tinted daguerreotype portrait of a seated woman in a polka-dot dress.

Kate McDougall, ca. 1848 (MIKAN 3192966)

The science of capturing light on a photographic surface was co-developed in France by Louis-Jacques-Mandé Daguerre (1787–1851) and Joseph-Nicephore Niépce (1765–1833). Niépce died before practical success was achieved, and Daguerre went on to perfect the process. Highly polished silver-plated sheets of copper that were sensitized with iodine vapours and developed in mercury fumes, daguerreotypes created compelling, one-of-a-kind images with infinite detail.

A new exhibition at the National Gallery of Canada features examples of these special objects. While not rare, daguerreotypes are not often exhibited due to their susceptibility to light and environmental degradation. Drawn from the collection of Library and Archives Canada, the objects in this exhibition have undergone careful preservation and conservation treatment, and offer the viewer an extraordinary look at these unique photographs. Intimate, detailed and captivating, these objects—reflective by their very nature—are some of the earliest photographic glimpses of Canada in existence.

A daguerreotype photograph of a man (standing) and a woman sitting on the ground, among the destroyed remains of the brewery.

The Molson family brewery after the fire, Montréal, Quebec, 1858 (MIKAN 3192967)

The exhibition features street scenes as well portraits of both well-known and unknown personalities. Most likely taken in Europe in the late 1840s, the portrait of Maungwudaus, a member of the Anishnaabe Nation of the New Credit Mississauga, is one of the earliest photographic portraits of an Aboriginal person in the Library and Archives Canada collection. Maungwudaus grew up near what is now Kitchener-Waterloo, Ontario. Educated by Methodist missionaries, he later worked in mission outreach and as a translator and writer before finding acclaim as a performer in a “Wild West” show that he along with friends and family members, organized and travelled through parts of the U.S. and Europe. The troupe was celebrated in England and in France where Maungwudaus was presented with several medals by King Louis Philippe I.

Daguerreotype portrait of Maungwudaus wearing ceremonial dress including a feathered headdress and two medals.

Maungwudaus, ca. 1846 (MIKAN 3198805)

As one-of-a-kind objects designed to be stored in a closed case and looked at by one viewer at a time, daguerreotypes are intimate by nature. Some show the wear and tear expected of objects over a century old. Often, the names of the sitters or any other accompanying information has long since disappeared, making the exceptions even more special. One such example is the portrait of a group of merchants from Yarmouth, Nova Scotia, dated 1855. This daguerreotype had a small manuscript tucked inside at the back of the plate, which is signed by one of the sitters and lists all the members of the group, as well as the location of the sitting and the name of the daguerreotypist, Wellington Chase. In this portrait, among others, we can see Loran Ellis Baker, seated front row, centre. Twenty-four years old at the time of this portrait, Baker was one of Yarmouth’s most prominent businessmen and civic leaders, and a member of the Legislative Council of Nova Scotia from 1878 to 1900.

A velvet-lined case with a daguerreotype portrait of nine men: five seated in front, four standing.

Group of merchants from Yarmouth, Nova Scotia, 1855 (MIKAN 3622937)

Visit the exhibition at the National Gallery of Canada in Ottawa from September 4 to February 28, 2016.