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 several techniques that can be used for these processes. One such technique is called cyanotype. It is also known as blueprinting and it happens to be the oldest non silver photographic process in existence. This technique involves the exposure of materials that have been treated with solutions of potassium ferricynide and ferric ammonium citrate to the sun, which is a UV source.
Blocking UV light from sensitized material can achieve positive images as well as negative. It will likely retain the image even after a thorough rinsing with water. After it has dried up, the exposed part may turn a particular shade of blue as the remaining parts remain the same color by default.
There is another method that utilizes Inkodye, which is considered to be a specialized vat dye type. It posses a particular quality in light sensitivity, which means it can be utilized in the process. What makes this particular element unique is that the colors are developed with sunlight when it comes to Inkodyes, unlike the oxygen developed colors of other vat dyes.
The colorless form, which is originally colorless, will be improved upon when exposed to UV light compared to what it was when suspended in leuco form. As far as usage is concerned, it resembles cyanotype but with some notable differences. Chief among them would be the fact that it can be utilized on textiles and has a full range when it comes to color.
The time for exposure may vary from either three minutes to as much as fifteen. It will depend on the desired color and the level of intensity displayed by the light. After exposure, the material has to be washed using water and soap so the dye can be removed from the unexposed areas.
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 being used to coat the surface before being dried in conditions with low brightness. The treated gelatine layer is to be secured in tight contact with a translucent positive as it is exposed to sunlight over a period of half an hour. At this point, both the light and the potassium dichromate will tan the gelatine being exposed to the light.
Removing and washing out the untanned gelatine with the use of warm water can allow development for the plate. Once it is dry, on the plate will be the revealed relief print. The surface has the capacity to be inked and then printed should there be a need to produce a mass amount. Sun sensitive paper can be considered just one tool within these various techniques that will require tons of effort.
There are several techniques that can be used for these processes. One such technique is called cyanotype. It is also known as blueprinting and it happens to be the oldest non silver photographic process in existence. This technique involves the exposure of materials that have been treated with solutions of potassium ferricynide and ferric ammonium citrate to the sun, which is a UV source.
Blocking UV light from sensitized material can achieve positive images as well as negative. It will likely retain the image even after a thorough rinsing with water. After it has dried up, the exposed part may turn a particular shade of blue as the remaining parts remain the same color by default.
There is another method that utilizes Inkodye, which is considered to be a specialized vat dye type. It posses a particular quality in light sensitivity, which means it can be utilized in the process. What makes this particular element unique is that the colors are developed with sunlight when it comes to Inkodyes, unlike the oxygen developed colors of other vat dyes.
The colorless form, which is originally colorless, will be improved upon when exposed to UV light compared to what it was when suspended in leuco form. As far as usage is concerned, it resembles cyanotype but with some notable differences. Chief among them would be the fact that it can be utilized on textiles and has a full range when it comes to color.
The time for exposure may vary from either three minutes to as much as fifteen. It will depend on the desired color and the level of intensity displayed by the light. After exposure, the material has to be washed using water and soap so the dye can be removed from the unexposed areas.
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 being used to coat the surface before being dried in conditions with low brightness. The treated gelatine layer is to be secured in tight contact with a translucent positive as it is exposed to sunlight over a period of half an hour. At this point, both the light and the potassium dichromate will tan the gelatine being exposed to the light.
Removing and washing out the untanned gelatine with the use of warm water can allow development for the plate. Once it is dry, on the plate will be the revealed relief print. The surface has the capacity to be inked and then printed should there be a need to produce a mass amount. Sun sensitive paper can be considered just one tool within these various techniques that will require tons of effort.
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