The Dawn of Photography: From Paper to Glass explores the origins of photography, tracing its evolution from William Henry Fox Talbot’s groundbreaking invention of the calotype paper negative process in 1841 to Frederick Scott Archer’s transformative introduction of the wet plate collodion process in 1851.
While the daguerreotype, a positive process, captured early public attention with its striking detail, the negative-to-positive processes truly shaped photography’s future, enabling reproducibility and artistic versatility. This series examines the technical innovations, artistic advancements, and historical context that defined photography’s formative years, highlighting the pioneers who harnessed light and chemistry to create enduring works of art. Through each article, readers will uncover the challenges faced, the breakthroughs achieved, and the enduring legacies that laid the foundation for modern photographic practices and revolutionized the art of preserving the world through imagery.
Article 1: The Dawn of Photography: Innovations That Led to the Calotype
The story of photography is one of relentless curiosity, scientific breakthroughs, and a collective desire to capture the ephemeral world in permanent form. It began in 1724 with the German scientist Johann Heinrich Schulze, who discovered that silver compounds darken when exposed to light.
Schulze’s photograms—the first of their kind—were made by placing text in front of a surface coated with his light-sensitive solution. While these creations were remarkable, they were fleeting, as Schulze could not preserve or “fix” the images. Nevertheless, his discovery laid the foundation for future advancements.
Decades later, in 1777, Swedish chemist Carl Wilhelm Scheele built on Schulze’s work. Scheele’s experiments with silver solutions revealed that ammonia could wash away unexposed silver chloride, leaving behind exposed metallic silver. This effectively created the first fixer, a pivotal step toward preserving photographic images. Although Scheele did not create photographs in the modern sense, his work was instrumental in developing photographic chemistry.
The early 19th century marked the emergence of more tangible photographic experiments. In 1802, Thomas Wedgwood attempted to capture the world around him on paper coated with silver nitrate. While Wedgwood’s photograms of objects and silhouettes represented a leap forward, he could not fix his images, leaving them as transient as those of his predecessors. His work, however, served as a cornerstone for future advancements in photography.
In 1816, Joseph Nicéphore Niépce entered the scene as the first person to create a photograph using a camera obscura. He utilized silver chloride to produce a negative image but was similarly stymied by the lack of a reliable fixing method. This limitation drove him to experiment with bitumen, resulting in the first preserved photograph in 1823—an image still admired today. Niépce’s partnership with Louis-Jacques-Mandé Daguerre in the early 1830s brought further progress, as Daguerre discovered that iodine could significantly increase the light sensitivity of silver. Using this knowledge, Daguerre produced his first photographs with an exposure time of just three minutes.
Bitumen, specifically bitumen of Judea, is a naturally occurring form of asphalt or pitch, a semi-solid form of petroleum. It has been used for centuries for various purposes, including waterproofing, adhesive applications, and even in artistic endeavors such as engraving. Chemically, bitumen is a complex mixture of hydrocarbons and other organic materials.
When exposed to light, bitumen undergoes a process called photo-hardening, where the areas exposed to light become insoluble in solvents such as oil of lavender or turpentine. This property makes it possible to create an image by selectively exposing a surface coated with bitumen to light and then washing away the unexposed parts.
Niépce’s interest in bitumen likely stemmed from its known light sensitivity and durability and his familiarity with its applications in etching and engraving processes. During Niépce’s time, bitumen was already used in art and printing techniques. For example, bitumen was applied to metal or glass surfaces as a resist in engraving or etching. Artists would etch designs into the protected areas, and the unprotected parts would be etched away using acid. This process required precise control, and the photo-hardening property of bitumen was crucial for such applications.
Niépce’s exposure to these artistic and industrial uses may have inspired him to explore its potential for capturing images. As an inventor and scientist interested in optics and chemistry, he would have been curious about substances that reacted to light. His application of bitumen in photography was innovative: he coated a pewter plate with bitumen, exposed it to light in a camera obscura, and then washed away the unexposed areas with a solvent, leaving a hardened image behind. This process produced the first permanent photograph, known as “View from the Window at Le Gras” (circa 1826 or 1827).
Niépce likely drew from several sources of knowledge:
Artistic Techniques: Bitumen’s use in etching and engraving was well-documented in creative circles. Its ability to harden under light was known to craftsmen.
Scientific Literature: The late 18th and early 19th centuries saw a surge in chemical research, including studies on light-sensitive materials. Niépce may have been influenced by earlier experiments, such as Johann Heinrich Schulze’s discovery of light-sensitive silver salts.
Personal Experimentation: Niépce’s inquisitive nature and scientific curiosity drove him to test materials with properties that could serve his goal of creating permanent images. He experimented widely before identifying bitumen as a viable material.
Niépce’s use of bitumen was both innovative and grounded in the practical knowledge of his time. By combining bitumen’s photo-hardening properties with his understanding of chemistry and optics, Niépce achieved a monumental breakthrough in the history of photography.
Daguerre’s work paralleled that of Antoine Hercule Romuald Florence, a French-Brazilian scientist who, in 1833, utilized a camera obscura and silver chloride to create images. Florence was the first to employ the concept of negatives and positives, coining the term “photographie” to describe his process. Although his original photographs no longer survive, his photograms, document copies, and even labels fixed with urine still exist as a testament to his ingenuity.
The 1830s were a time of rapid progress, culminating in several groundbreaking discoveries in 1839. That year, Daguerre patented the daguerreotype, a method that produced a latent image made visible through exposure to mercury vapor. Simultaneously, Hippolyte Bayard developed direct positive printing, a precursor to modern instant photography. William Henry Fox Talbot, working independently, showcased his silver chloride photograms and salt prints at the Royal Institution of Great Britain. These “printing out” processes required long exposure times but marked a significant step forward in photographic reproducibility.
The scientific underpinnings of these developments were bolstered by John Herschel’s discovery of sodium thiosulfate, or hypo, as a superior fixer. Herschel’s findings were promptly shared with both Daguerre and Talbot, greatly enhancing the durability of their images. Around the same time, the Rev. J. B. Reade found that gallic acid could dramatically increase the sensitivity of paper negatives, reducing exposure times and enabling finer detail.
By 1841, Talbot refined his techniques and patented the calotype, which relied on iodized paper and gallic acid development to produce latent images. This innovation offered shorter exposure times and reproducibility, positioning the calotype as a transformative step in photography’s evolution. Talbot’s process, however, was not without its challenges. Early calotypes suffered from instability and variable quality, leading to further refinements.
In 1847, Louis-Désiré Blanquart-Evrard revolutionized the calotype by introducing a more reliable method for sensitizing paper, significantly improving image quality. Jacques-Michel Guillot-Saguez simplified the process even further, eliminating redundant chemical steps and making photography more accessible. Around the same time, Claude Félix Abel Niépce de Saint-Victor introduced albumenized glass negatives, providing greater sharpness and tonal range than paper negatives.
The 1850s brought additional innovations, such as Jean-Baptiste Gustave Le Gray’s waxed paper negatives, which enhanced durability and sharpness, even in challenging conditions. However, the era of paper negatives began to wane with the advent of the wet plate collodion process, introduced by Frederick Scott Archer in 1851. This new method offered unprecedented detail and clarity, quickly overshadowing earlier techniques.
By the late 19th century, the Eastman Company introduced bromide paper, briefly reviving interest in paper negatives before celluloid film transformed photography yet again. Despite these shifts, the contributions of early pioneers like Schulze, Scheele, Niépce, Daguerre, and Talbot remain foundational. With its reproducibility and artistic potential, the calotype bridged the gap between scientific exploration and the enduring art of photography, leaving an indelible mark on the medium’s history.
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