Tlr Camera

Sun Printing

Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (September 2008)

Anna Atkins algae cyanotype

Sun printing can be done through three processes, most commonly it is a photographic process in which the final print is produced by conventional lithographic printing processes. The process uses a film of gelatine spread on a flat and rigid surface. This is coated with a dilute solution of Potassium dichromate and dried in low light conditions. A translucent positive of the final print is secured in tight contact with the treated gelatine layer and exposed to bright sunlight for a period of up to 30 minutes. During this time the sunlight and the Potassium dichromate tan the gelatine exposed to light.

The gelatine layer is developed by washing in warm water so that the untanned gelatine is washed away. The plate is dried revealing the required design as a relief print. The surface can be inked and printed in a hand press to produce any number of identical prints of the original subject.

The other process involves the "printing-out" of a negative in contact with a sheet of black and white photographic paper and exposing it to the sun. Depending on type of paper the exposure will vary from a few minutes to a couple of hours. The paper will produce a developed image in brownish to purple hues, again depending on the paper used. The paper is then fixed and washed as in normal processing. Prints can later be toned to achieve different tones.

The third, and most traditional form of sun printing, is called cyanotype. It involves exposing materials which have been treated with a solution of potassium ferricyanide and ferric ammonium citrate, to UV light, where an image is printed on the material through a chemical reaction and is set by washing with plain water. For instance, if a leaf is placed upon paper treated with this solution and left to sit out in the sun for about 10 minutes, the paper will retain the image of the leaf after it has been rinsed with water. After the paper dries, everything that was exposed to the UV rays of the sun will turn a shade of Prussian blue, while the part that was covered by the leaf will remain white.

Another process also called sunprinting is the use of Setacolor Transparent light-sensitive paint, on fabric, to create a photonegative image. This type of sunprint is a contact photography monoprint. Multiple washes of paint can be layered to create artistic effects, and although the clearest prints still come from blue, other colours have recently been developed by Pebeo. This type of sunprinting is also called heliography. References: Boheme Magazine, November 03 issue. eBay Guide to Sunprint Art.

This photography-related article is a stub. You can help Wikipedia by expanding it.

v  d  e

External links

The solarplate process

Cyanotype Products

Sunprint Kit

v  d  e

Photography

Technical terms

Angle of view  Aperture  Circle of confusion  Color temperature  Depth of field  Depth of focus  Exposure  Exposure compensation  F-number  Film format  Film speed  Focal length  Hyperfocal distance  Metering mode  Perspective distortion  Photograph  Photographic printing  Photographic processes  Reciprocity  Red-eye effect  Science of photography  Shutter speed  Zone system

Genres

Aerial  Black and White  Commercial  Cloudscape  Documentary  Erotic  Fashion  Fine art  Forensic  Glamour  High speed  Landscape  Nature  Nude  Photojournalism  Pornography  Portrait  Post-mortem  Senior  Social documentary  Sports  Still life  Stock  Street  Vernacular  Underwater  Wedding  Wildlife

Techniques

Afocal photography  Bokeh  Contre-jour  Cross processing  Cyanotype  Film developing  Fill flash  Fireworks  Harris Shutter  Kite aerial  Macro  Multiple exposure  Night  Panoramic  Panning  Photogram (Kirlian)  Print toning  Rephotography  Rollout  Sabatier Effect  Stereoscopy  Stopping Down  Sun printing  Infrared  Ultraviolet  Time-lapse  Tilt-shift

Composition

Geometry and symmetry  Framing  Headroom  Lead room  Rule of thirds  Simplicity

Equipment

Camera (Pinhole  Rangefinder  SLR  Still  TLR  Toy  View)  Darkroom (Enlarger  Safelight)  Film (Base  Format  Holder  Stock)  Filter  Flash  Manufacturers  Movie projector  Photographic lens  Slide projector  Tripod  Zone plate

History

Autochrome Lumire  Calotype  Daguerreotype  Dufaycolor  Heliography  Timeline of photographic technology

Digital photography

Digital camera (D-SLR  Digital back)  Photo sharing  Digital and film compared  Image sensor (CMOS APS  CCD  Three-CCD  Foveon X3)  Pixel  Film scanner

Color photography

Color  Color management (Color space  Primary color  RGB  CMYK)  Color film (Print  Slide)

Photographic processing

C-41 process  Cross processing  Developer  Dye coupler  E-6 process  Fixer  Push processing   Stop bath   K-14 process

Other topics

Analog photography   Camera obscura  Digiscoping  Gelatin-silver process  Gum printing  Holography  Lomography  Photography and the law  Photography museums and galleries (category)  Print permanence  Vignetting  Visual arts

List of photographers  List of most expensive photographs  Portal  WikiProject

Categories: Photography stubs | Photographic processes | Non-impact printingHidden categories: Articles lacking sources from September 2008 | All articles lacking sources
About the Author

I am an expert from China Manufacturers, usually analyzes all kind of industries situation, such as vacuum seal storage bags , spacebag.

Yashica Mat 124G TLR camera Restoration part 1