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 many techniques that can possibly be utilized for these processes. One way is the cyanotype. To the unaware, it is otherwise called blueprinting and it is also the most dated non silver photographic process to date. It involves exposing the materials that are being treated with potassium ferricynide solutions as well as ferric ammonium citrate to sunlight, which is used as a source of UV.
Positive and negative images can be achieved by the blocking of UV light from the material that has been sensitized. After being thoroughly rinsed using water, the paper will still retain the image. Once it dries, the parts that were exposed may turn a shade of blue as the rest of the parts will stay more or less the same.
Another way is to make use of a specialized type of vat dye known as Inkodye. This can be used for this process due to its light sensitive quality. They differ from other vat dyes since they do not make use of oxygen in order to develop the color. Instead, these Inkodyes are developed by the light.
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 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 dilute solutions can be used for the coating of the surface before it is dried in certain conditions that have low brightness. The treated layer has to be secured and in tight contact, especially with translucent positives as its going to be exposed to the sun for a period of thirty minutes. The potassium dichromate and the light will, at this point, cause the gelatine to tan.
Having untanned gelatine removed and washing it out with warm water can develop the plate. Once dry, the relief print will be revealed on the plate. The surface can possibly be inked followed by printing if there is ever a need to mass produce. Accomplishing any of these methods, whether with sun sensitive paper or not requires a lot of effort and other materials.
There are many techniques that can possibly be utilized for these processes. One way is the cyanotype. To the unaware, it is otherwise called blueprinting and it is also the most dated non silver photographic process to date. It involves exposing the materials that are being treated with potassium ferricynide solutions as well as ferric ammonium citrate to sunlight, which is used as a source of UV.
Positive and negative images can be achieved by the blocking of UV light from the material that has been sensitized. After being thoroughly rinsed using water, the paper will still retain the image. Once it dries, the parts that were exposed may turn a shade of blue as the rest of the parts will stay more or less the same.
Another way is to make use of a specialized type of vat dye known as Inkodye. This can be used for this process due to its light sensitive quality. They differ from other vat dyes since they do not make use of oxygen in order to develop the color. Instead, these Inkodyes are developed by the light.
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 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 dilute solutions can be used for the coating of the surface before it is dried in certain conditions that have low brightness. The treated layer has to be secured and in tight contact, especially with translucent positives as its going to be exposed to the sun for a period of thirty minutes. The potassium dichromate and the light will, at this point, cause the gelatine to tan.
Having untanned gelatine removed and washing it out with warm water can develop the plate. Once dry, the relief print will be revealed on the plate. The surface can possibly be inked followed by printing if there is ever a need to mass produce. Accomplishing any of these methods, whether with sun sensitive paper or not requires a lot of effort and other materials.
About the Author:
Read more about Sun Sensitive Paper And Other Means Of Printing visiting our website.
No comments:
Post a Comment