A critical factor when it comes to certain printing techniques is sunlight. These techniques are referred to as sun printing and it can be accomplished with the use of several methods, with varying tools such as sun sensitive paper. One of the things they have in common is using sunlight as fixatives or a developing agent.
There are a lot of techniques to utilize for specific processes. Among these would be the cyanotype, which is alternatively called blueprinting. It is also the oldest photographic process that is non silver. Having the materials exposed and treated with solutions that are potassium ferricynide in origin together with ferric ammonium citrate towards the sun is what this process entails.
By blocking the UV light from the sensitized material, both negative or positive images can be obtained. The paper itself will retain the image after it has been thoroughly rinsed with water. After it dries up, the exposed parts will turn a certain shade of blue, while the other parts will remain with the default color.
Another method would be to utilize Inkodye, which is a special vat dye type. This is to be used for the process because it possesses a certain light sensitive quality. Instead of being developed by oxygen, the colors of Inkodyes is developed by light in its place.
When it becomes exposed to UV, it improves upon its originally colorless form from when it was still suspended in that leuco form. It will resemble cyanotype in terms of usage but there are some notable differences between them as well. Mainly, these are utilized on textiles and exist in a full range of colors.
The time it needs to be exposed may vary between three minutes to fifteen. It all depends on what the color is and what intensity level is exhibited by the light. Once it has been exposed, the material must now be washed with both soap and water for the dye to be removed from areas that are unexposed.
Other methods as it pertains to sun printing involve the potassium dichromate utilizing photographic processes. These processes are known to allow negative plates to be created when lithographic printing is used. The gelatine films are to be used by spreading it all over rigid and flat surfaces.
Potassium dichromate in a dilute solution is usable for coating the surface before it can be dried in a condition with low brightness. The gelatine layer needs to be secure and in tight contact with with translucent positives since its to be exposed to sunlight for about thirty minutes. The light and potassium dichromate will, at this point, tan the gelatine
The plate can be developed by washing it with warm water and having the untanned gelatine removed. After it is dry, the relief print is now revealed on the plate itself. This surface can be inked and then printed if a mass production of identical prints is needed. These, along with sun sensitive paper is all that is needed to accomplish these techniques.
There are a lot of techniques to utilize for specific processes. Among these would be the cyanotype, which is alternatively called blueprinting. It is also the oldest photographic process that is non silver. Having the materials exposed and treated with solutions that are potassium ferricynide in origin together with ferric ammonium citrate towards the sun is what this process entails.
By blocking the UV light from the sensitized material, both negative or positive images can be obtained. The paper itself will retain the image after it has been thoroughly rinsed with water. After it dries up, the exposed parts will turn a certain shade of blue, while the other parts will remain with the default color.
Another method would be to utilize Inkodye, which is a special vat dye type. This is to be used for the process because it possesses a certain light sensitive quality. Instead of being developed by oxygen, the colors of Inkodyes is developed by light in its place.
When it becomes exposed to UV, it improves upon its originally colorless form from when it was still suspended in that leuco form. It will resemble cyanotype in terms of usage but there are some notable differences between them as well. Mainly, these are utilized on textiles and exist in a full range of colors.
The time it needs to be exposed may vary between three minutes to fifteen. It all depends on what the color is and what intensity level is exhibited by the light. Once it has been exposed, the material must now be washed with both soap and water for the dye to be removed from areas that are unexposed.
Other methods as it pertains to sun printing involve the potassium dichromate utilizing photographic processes. These processes are known to allow negative plates to be created when lithographic printing is used. The gelatine films are to be used by spreading it all over rigid and flat surfaces.
Potassium dichromate in a dilute solution is usable for coating the surface before it can be dried in a condition with low brightness. The gelatine layer needs to be secure and in tight contact with with translucent positives since its to be exposed to sunlight for about thirty minutes. The light and potassium dichromate will, at this point, tan the gelatine
The plate can be developed by washing it with warm water and having the untanned gelatine removed. After it is dry, the relief print is now revealed on the plate itself. This surface can be inked and then printed if a mass production of identical prints is needed. These, along with sun sensitive paper is all that is needed to accomplish these techniques.
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