3.6 Photogravure

Photogravure, a revolutionary printmaking technique, combines photography and intaglio printing. Developed in the mid-19th century, it allowed for the reproduction of continuous-tone photographic images, bridging the gap between photography and traditional etching processes.

The process involves transferring a photographic image onto a light-sensitive plate, which is then etched and printed. This technique produces exceptional tonal range and detail, making it a favorite among fine art printmakers for its ability to create rich, nuanced images.

History of photogravure

• Photogravure emerged as a revolutionary printmaking technique combining photography and intaglio printing
• Developed in the mid-19th century, photogravure allowed for the reproduction of continuous-tone photographic images
• Significantly impacted the world of printmaking by bridging the gap between photography and traditional etching processes

Early photographic processes

• Daguerreotype introduced in 1839 marked the beginning of photography
• Calotype process developed by William Henry Fox Talbot in 1841 allowed for multiple prints from a single negative
• Wet plate collodion process invented in 1851 improved image quality and reduced exposure times

Development of photogravure

• Karel Klíč refined the photogravure process in 1879, creating a more reliable and reproducible method
• Photogravure utilized a light-sensitive gelatin layer to transfer photographic images onto copper plates
• Process allowed for rich tonal gradations and fine detail reproduction previously unattainable in printmaking

Key innovators and artists

• Joseph-Nicéphore Niépce experimented with early photomechanical reproduction techniques in the 1820s
• William Henry Fox Talbot patented the photoglyphic engraving process, a precursor to photogravure, in 1852
• Peter Henry Emerson championed photogravure as a fine art medium in the late 19th century
• Alfred Stieglitz utilized photogravure extensively in his groundbreaking photography journal "Camera Work"

Photogravure process overview

• Photogravure combines elements of photography, etching, and intaglio printing to create high-quality reproductions
• Process involves transferring a photographic image onto a light-sensitive plate, which is then etched and printed
• Allows for exceptional tonal range and detail, making it a favored technique among fine art printmakers

Light-sensitive materials

• Dichromated gelatin serves as the primary light-sensitive material in traditional photogravure
• Gelatin hardens when exposed to light, creating areas resistant to etching
• Modern polymer plates offer an alternative light-sensitive material for contemporary photogravure processes

Plate preparation

• Copper plates traditionally used for their durability and ability to hold fine detail
• Plates cleaned and polished to ensure a smooth, uniform surface
• Aquatint applied to create a textured surface for ink retention
  • Rosin dust or spray paint commonly used for aquatint application
  • Even distribution crucial for achieving consistent tonal gradations

Exposure techniques

• Contact printing method used to transfer the image onto the light-sensitive plate
• UV light sources employed for exposure, with timing carefully controlled
• Multiple exposures sometimes utilized to enhance tonal range and contrast

Etching and printing

• Exposed plate etched in ferric chloride solution to create ink-holding cells
• Depth of etching varies based on exposure, creating areas of different ink capacity
• Intaglio printing process used to transfer the etched image onto paper
  • Ink applied to plate and wiped, leaving ink only in etched areas
  • Damp paper and plate passed through a printing press under high pressure

Equipment and materials

• Photogravure requires specialized equipment and materials to achieve high-quality results
• Combination of photographic and printmaking tools necessary for the complete process
• Careful selection and maintenance of equipment crucial for consistent outcomes

Cameras and film

• Large format cameras (4x5, 8x10) preferred for their image quality and detail
• Fine-grained black and white film typically used for optimal tonal range
• Digital cameras with high resolution can be utilized for creating digital negatives

Photogravure plates

• Copper plates remain the traditional choice for their durability and tonal qualities
• Steel-faced copper plates offer increased longevity for larger print runs
• Polymer plates provide a more accessible option for contemporary practitioners
  • Require less toxic chemicals and simplified processing

Chemicals and solutions

• Ferric chloride serves as the primary etching solution in photogravure
• Potassium dichromate used to sensitize gelatin in traditional processes
• Developer and fixer solutions required for processing photographic materials
• Safe handling and disposal of chemicals essential for studio safety

Printing presses

• Etching presses with adjustable pressure settings ideal for photogravure printing
• Large bed sizes accommodate various plate dimensions
• Felt blankets and tympan paper used to ensure even pressure distribution during printing

Image preparation

• Careful consideration of image characteristics essential for successful photogravure prints
• Adjustments made to optimize tonal range and contrast for the photogravure process
• Image preparation techniques vary depending on the use of digital or analog methods

Tonal range considerations

• Photogravure capable of reproducing wide tonal range from deep blacks to delicate highlights
• Importance of preserving detail in shadow and highlight areas during image preparation
• Histograms and zone system utilized to evaluate and adjust tonal distribution

Contrast adjustment

• Contrast often increased to compensate for the inherent softness of the photogravure process
• Dodging and burning techniques employed to selectively adjust local contrast
• Unsharp masking applied to enhance edge definition and perceived sharpness

Digital vs analog negatives

• Traditional process uses large format film negatives for contact printing
• Digital negatives created using inkjet printers on transparent film
  • Allow for greater control and manipulation of image characteristics
  • Require careful calibration to achieve desired tonal range and density
• Hybrid approaches combining analog and digital techniques increasingly common in contemporary practice

Plate-making techniques

• Various methods developed for creating photogravure plates, each with unique characteristics
• Choice of technique depends on desired aesthetic, available materials, and personal preference
• Continuous refinement of plate-making processes throughout the history of photogravure

Gelatin resist method

• Traditional technique developed by Karel Klíč in the late 19th century
• Copper plate coated with light-sensitive gelatin resist
• Resist hardens in proportion to light exposure, creating an acid-resistant layer
• Plate etched in ferric chloride, with resist protecting highlight areas

Carbon tissue process

• Refined version of the gelatin resist method using pre-sensitized carbon tissue
• Carbon tissue exposed to UV light through a positive transparency
• Exposed tissue adhered to copper plate and developed in warm water
• Resulting gelatin relief on plate corresponds to image tones

Polymer photogravure

• Modern adaptation using light-sensitive polymer plates
• Eliminates need for toxic chemicals and simplifies plate-making process
• Plates exposed to UV light through a negative or digital positive
• Unexposed areas washed away with water, creating relief for ink retention
• Offers faster production times and increased accessibility for contemporary printmakers

Etching and printing

• Critical stage in the photogravure process where the image is transferred to the plate
• Precise control of etching and printing variables essential for achieving desired results
• Combination of technical skill and artistic judgment required for successful execution

Etching bath composition

• Ferric chloride solution used as primary etching agent
• Concentration and temperature of bath affect etching speed and quality
• Baume scale used to measure and maintain consistent solution strength
• Additives sometimes incorporated to modify etching characteristics (alcohol, citric acid)

Etching time and depth

• Etching time varies based on desired tonal range and plate material
• Step etching technique used to achieve optimal tonal gradation
  • Plate progressively etched in stages, protecting highlight areas
• Etching depth monitored using microscope or step gauge
• Overetching can lead to loss of highlight detail and excessive plate wear

Ink selection and application

• Oil-based etching inks traditionally used for photogravure printing
• Ink viscosity and tack adjusted to suit image characteristics and paper type
• Application methods include daubers, rollers, and card scrapers
• Careful wiping technique crucial for achieving proper ink distribution
  • Tarlatan cloth and hand wiping used to remove excess ink from plate surface

Paper choice and preparation

• High-quality, acid-free papers preferred for archival stability
• Papers with sufficient tensile strength to withstand pressure of printing press
• Traditional favorites include (Arches, Somerset, Hahnemühle)
• Paper dampened before printing to enhance ink absorption and detail rendition
  • Controlled humidity essential for consistent results

Artistic considerations

• Photogravure offers unique aesthetic qualities that distinguish it from other printmaking techniques
• Artists exploit the process's characteristics to create expressive and nuanced images
• Understanding of photogravure's strengths and limitations informs artistic decision-making

Tonal qualities in photogravure

• Exceptional ability to render subtle tonal gradations and deep, velvety blacks
• Soft, atmospheric quality often associated with photogravure prints
• Tonal compression in highlight areas can be used for artistic effect
• Manipulation of tonal range through image preparation and plate-making techniques

Texture and detail reproduction

• Photogravure capable of reproducing fine detail and textures
• Aquatint grain contributes to overall image texture and tonal qualities
• Plate tone retained in non-image areas adds depth and atmosphere to prints
• Artists may emphasize or minimize texture through choice of materials and techniques

Photogravure vs other printmaking techniques

• Photogravure combines photographic precision with intaglio printing aesthetics
• Offers greater tonal range compared to traditional etching or aquatint
• More labor-intensive and time-consuming than many other printmaking processes
• Unique visual qualities set photogravure apart from digital or offset printing methods
• Artists often choose photogravure for its ability to convey subtle atmospheric effects

Contemporary applications

• Photogravure continues to evolve and find new applications in the digital age
• Process valued for its unique aesthetic qualities and historical significance
• Contemporary practitioners explore innovative approaches and hybrid techniques

Fine art photogravure

• Resurgence of interest in photogravure among contemporary photographers and printmakers
• Process used to create limited edition prints of high artistic and collectible value
• Galleries and museums increasingly recognize photogravure as a distinct fine art medium
• Artists explore combination of traditional photogravure with digital imaging techniques

Commercial uses

• High-end book and magazine publishing utilize photogravure for premium reproductions
• Luxury brands incorporate photogravure prints in marketing and packaging materials
• Limited edition portfolios and collector's items produced using photogravure process
• Specialized printing houses offer photogravure services for commercial clients

Digital photogravure processes

• Integration of digital technologies with traditional photogravure techniques
• Computer-to-plate systems allow direct digital imaging of photopolymer plates
• Digital negatives created using inkjet printers on transparent film
• Software tools developed for tone mapping and calibration specific to photogravure
• Hybrid workflows combine digital image preparation with traditional plate-making and printing

Preservation and archiving

• Photogravure prints known for their longevity and archival stability
• Proper preservation techniques essential for maintaining print quality over time
• Collectors and institutions implement specialized storage and handling procedures

Print longevity

• Photogravure prints on high-quality papers can last for centuries if properly cared for
• Intaglio inks used in photogravure highly resistant to fading and deterioration
• Archival qualities superior to many other photographic printing processes
• Factors affecting longevity include paper quality, environmental conditions, and handling

Storage and handling

• Prints stored flat in acid-free archival boxes or folders
• Interleaving with acid-free tissue paper prevents surface damage and transfer of inks
• Climate-controlled environment with stable temperature and humidity recommended
• Minimal handling with clean, lint-free gloves to prevent oils and dirt transfer
• Proper matting and framing techniques used for display and long-term preservation

Conservation techniques

• Regular inspection of prints for signs of deterioration or damage
• Gentle surface cleaning using soft brushes or specialized cleaning pads
• Repair of tears or structural damage performed by trained conservators
• Deacidification treatments applied to neutralize acids in paper substrate
• Digital documentation and scanning of prints for archival records and reproduction

Notable photogravure artists

• Photogravure has attracted numerous artists throughout its history
• Practitioners range from early pioneers to contemporary innovators
• Influential works in photogravure have shaped the medium and inspired generations of artists

Historical figures

• Peter Henry Emerson championed photogravure as a fine art medium in the late 19th century
• Alfred Stieglitz extensively used photogravure in his groundbreaking photography journal "Camera Work"
• Edward S. Curtis documented Native American cultures in his monumental work "The North American Indian" using photogravure
• Alvin Langdon Coburn explored pictorialist aesthetics through photogravure prints

Contemporary practitioners

• Lothar Osterburg combines photogravure with handmade miniature sets to create surreal imagery
• Janne Laine experiments with alternative plate materials and innovative etching techniques
• Jon Goodman revived interest in traditional photogravure processes through his prints and workshops
• Fiona Pardington incorporates Maori cultural themes in her photogravure works

Influential works

• Karl Blossfeldt's "Art Forms in Nature" showcased detailed botanical studies through photogravure
• Paul Strand's "Mexican Portfolio" demonstrated the expressive potential of photogravure in portraiture and landscape
• Robert Mapplethorpe's "Certain People" portfolio elevated photogravure in contemporary fine art photography
• Hiroshi Sugimoto's seascape series translated his minimalist aesthetic into richly toned photogravure prints