SINAFO offers simple techniques and tools to clean photographs
The second volume of the books of the National Photobank (Sinafo) entitled "How to take care of my photographs, offers simple techniques and tools to clean images and keep alive the memories.
Photos damaged by excessive moisture, oxidizing gases, adhesive tape or ink or oil stains and other damage and disruption can be recovered.
Very often a problem in this art is the curvature of the paper to the inside or outside of it, which is due to the gelatin substrate used for silver halide sensitized to shape the image shrinks or expands due to changes in relative humidity.
It also happens that the cool shade of the image changes to yellowish-brown shades by the presence of high humidity or oxidizing gases, which also causes loss of detail in the high lights. A continuous process due to the sulphidation of silver in the most serious cases can result in fading of the image.
Sometimes that happens in the substrate on which it is the image comes to adhere to the material that is used to wrap or store the material. And it is also caused by high humidity at the site where the item is stored, causing colonies of microorganisms that appear on the substrate.
Including damage on the surface of printing due to abrasion, ie by the friction of many contacts.
Cleaning techniques for this type of photo prints and more like paper salty, albumin, collodion, matte and glossy collodion, and gelatin undisclosed papers, are in the "Caring for my photographs" Juan Carlos Valdez Marin.
Designed for specialists in the conservation of photographic images, the simplicity of the text also gives the general public about some great choices cleaning techniques.
The first is the support that using a fine brush and soft withdrew from the center toward the edges all the dust particles. Then, push and move against the picture with a cushion cleaner rubber dust to form a thin layer on the surface, which is removed with a circular movement of the tip of the index and middle fingers, then with the brush .
The spots that do not disappear after this treatment can be removed with a soft rubber eraser, which can be migajón, even with a more rigid rubber.
The traces of ink stamps and are treated with peroxide mixed with ammonia, applied with a brush on a table locally vacuum.
While to clean or remove oil stains should be spraying the back of the photograph with distilled water and then put a cotton swab with a solution of distilled water and morgolina table in a vacuum. Finally it is placed between silicone and blotting paper, pressing for 24 hours.
To remove the photo stickers are required to apply a moisturizer to allow removal without causing any damage or chemical damage to the piece.
The tapes "masking tape" and other papers requiring an adhesive substance moisturizer colloidal consistency as methylcellulose or synthetic clay Laponite.
Subsequently, a thin spatula or forceps can easily remove the negative.
In the case of plastic adhesive tape or Scotch tape, follow the same procedure, which applied only to moisturize amyl acetate.
It is recommended that the photos are saved for better conservation of cotton paper with features neutral, cellulose acetate or polypropylene, with a neutral pH.
In these materials can be preserved virtually all types of photographic material, from images of the nineteenth century to the modern, except for those with gum arabic as an adhesive.
It should be noted that no material is stored forever, so if changes in tone or appearance, the images must be changed immediately.
To date, nine volumes have been published in the Journal of the National Photobank, most recently disappeared and is entitled presences. Recovery of negative Maria Antonieta Roldán Arellano.
It will provide suggestions for care-white photographs, black and color, as well as glossaries of terms used in photographic conservation, glossaries and basic principles of digital photography, among others.
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