To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
Languages
Recent
Show all languages
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

From Wikipedia, the free encyclopedia

Anna Atkins algae cyanotype
Anna Atkins algae cyanotype

Sun printing may refer to various printing techniques which use sunlight as a developing or fixative agent.

YouTube Encyclopedic

  • 1/3
    Views:
    11 375
    20 295
    4 048
  • Fabric Sun Printing With Acrylics
  • SolarFast: Sunlight-developed Dye (Official Product Trailer)
  • Sun Printing

Transcription

Contents

Techniques

Cyanotype

Cyanotype, also referred to as "blueprinting", is the oldest non-silver photographic printing process.[1] It involves exposing materials which have been treated with a solution of potassium ferricyanide and ferric ammonium citrate to a UV light source such as the sun. Negative or positive images can be obtained by blocking UV light from reaching the sensitized material. For example, a negative image can be produced by placing a leaf upon paper treated with this solution and exposing to sunlight for 10 to 20 minutes. The paper will retain the image of the leaf after it has been rinsed with water. Once the paper dries, parts that were exposed to the sun will turn a shade of Prussian blue (ferric ferrocyanide), while parts that were covered by the leaf will remain white.

Light-sensitive vat dyes

A specialized type of vat dye called Inkodye is also used for sun-printing due to its light-sensitive quality.[2] Unlike other vat dyes which use oxygen to develop their color, Inkodyes are developed by light.[3] These dyes are suspended in leuco form appearing colorless until they are exposed to UV. Their usage resembles that of cyanotype, but unlike cyanotype Inkodyes are primarily used on textiles and exist in a full range of colors.[1] Exposure times vary from 3 to 15 minutes depending on the desired color and intensity of light.[4] Once exposed, the sensitized material is washed in soapy water to remove dye from unexposed areas. Such dyes are typically used by craftspeople, fabric printers and artists and can be printed with photographic negatives, resist paste or through a silk screen.

Potassium dichromate

Sun printing may also refer to a photographic process using potassium dichromate which produces a negative plate for conventional lithographic printing. 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 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 potassium dichromate tan the gelatine exposed to light. The plate is developed by washing in warm water and removing the untanned gelatine. Once dry, a relief print is revealed on the plate. The surface can be inked and printed in a hand press to produce any number of identical prints of the original subject.

References

  1. ^ a b House, Suda (1981). Artistic Photographic Processes. Amphoto Books. pp. 84–88. ISBN 0-8174-3541-7.
  2. ^ How to Dye and Paint Fabric with Light
  3. ^ Epp, Diane (1995). The Chemistry of Vat Dyes. Terrific Science Press. pp. 5–8. ISBN 1-883822-05-X.
  4. ^ Ray Laury, Jean (2010). Imagery on Fabric: A Complete Surface Design Handbook. C&T Publishing. pp. 122–123. ISBN 1-57120-034-7.

Further reading

External links

This page was last edited on 26 July 2017, at 23:39
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.