Cut poly(ester) sheets to sizes smaller than the screens used in a chamber. More blotters or felts can be added on outside of the Bristol board to increase pressure. Others believe that select RC photographs (chromogenic or gelatin silver) can be subjected to heat treatment in a dry mount press. The cutthroat competition among printing companies led to consolidations in the industry. Steamers that can release steam while in a horizontal position (like an iron) are most helpful for treating smaller items.
Fog-Buster, Cat Crap). A stock folder cut to the size of the press is useful for handling. The higher the ambient humidity in the work space, the faster the humidification process proceeds.
Silkscreening fabric comes in a variety of tight weaves and weights. 633, Serial No.
Given the Farringdon Road address and the style of the note design, it is surmised that this "5 Units" Printer’s Advertising Note was likely printed in the latter half of the 1870s. The length of time to humidify a photograph will vary depending on the type of photograph, condition of the photograph, the ambient humidity in the work environment, and the time at which the chamber was set up.
Commercial baker's racks can be modified into a large humidity chamber for batch humidification work by covering with plastic sheeting held closed with clips, and screens replacing the solid drawer-style trays. 632, with Serial No. Method works best for thin papers as it was originally designed to flatten long-fibered oriental papers (e.g.
As with Gore-Tex membrane damp packs, progress is dependent on how much moisture is used, condition of the photograph, type of photograph and ambient humidity in room.
Using Mirage board or a highly calendared board placed between the Hollytex and blotter paper during drying helps reduce the possibility of impressions in the gelatin emulsion layer when using any weighted flattening methods.
If both sides of the photograph are to be sprayed, begin with the back first, then flip over using a poly(ester) webbing or film support. Keeps uniform tension across the entire surface if the paper is tensioned out evenly. Consider the location of heat and air-conditioning vents, fans, windows, etc. Photographic Materials Conservation Catalog
Support the photograph on a secondary support before beginning. Experimental and early one-layer photographic images may be too fragile to flatten with conventional methods.
The degree of desired humidification necessary to achieve treatment goals. Mounting techniques are not covered here, found instead in the Backing, Lining, and Mounting entry. They provide even, consistent pressure overall and the amount of pressure can be adjusted somewhat through building up support boards within the press and degree of clamping done.
Insert boards as needed (e.g. 391, graded PMG 63 Choice Uncirculated. When air-drying follows any wet treatment with final flattening after re-humidification, the process is sometimes referred to as a "two-step" approach.
After removal from the bath, remove the bulk of the water by lightly padding the photograph with clean blotters front and back (Chen). “A Conditioning Chamber for Parchment and Other Materials”, The Paper Conservator: Journal of the Institute of Paper Conservation, (16): 27-30. The inclusion of corrugated boards in drying stacks (between the blotters-polyester web-photograph-polyester web-blotters groupings) is seen as a way that air can circulate through the stack, reducing the need for blotter changes (Kennedy).
With the adhesive side to the board, create a pocket for the photograph with the Japanese paper. Small molecule that keep fibers and potential additions from swelling too fast, or too much. Care must be taken to keep the temperature below 200°F, and preferably not higher than 170-180°F. Always use clean and smooth release paper. It is very important to bear in mind that this treatment is similar to an accelerated aging—with high heat and high humidity, which can promote silver oxidation or silver mirroring. Rotate the photograph to a dry spot on the silicone release paper several times or quickly change out pre-dried silicone release papers every 5-10 seconds in the press to prevent imparting ripples into the photographic materials. It is unlikely to be a coincidence that BWC produced this look-alike Printer’s Advertising Note in 1870 just after they lost their Argentinean printing contract with La Provincia de Buenos Ayres to ABNC to produce the new 1869-dated series of banknotes (Argentina Pick# S481-499). It is also used as a secondary support during treatment. (Ask the Moors for their special methods), When a sheet of gelatin takes on moisture, then is dried, it will shrink fairly evenly in length and width. Use finger pressure to pull the paper taut and set the paste. For most cases, pressure applied during the flattening process needs to be equally distributed throughout the photograph. Adding moisture to a heat and pressure flattening technique adds considerable risk to photographic materials. Caldararo, Niccolo. A sheet of poly(ester) webbing or silkscreen fabric (sometimes both), larger than the photograph, but smaller than the overall size of the screen, is sometimes placed on top of the screen to facilitate safer transfer of the photograph while damp and limp from the chamber to the press. Please try again later. Once relatively inexpensive and easy to find, old presses are rare(r) from second-hand resale options and can also be expensive if found (2016). Once relaxed sufficiently, transfer to press. was the author of any of them; VI and perhaps XXII (a) and (b) have the strongest claim to authenticity; an ascription to Sim. never bear the poet’s name, there is no certainty that Sim. ISO 18903:2002, Imaging Materials -- Film and paper -- Determination of dimensional change. Les inscriptions sont ouvertes toute l'année. Jose Orraca Conservation Studio. Messier, Paul (1993) “Cracking in Albumen Photographs: An ESEM Investigation”, Microscopy Research and Technique Wiley-Liss, Inc. [. Traditional wool felts can develop mold issues. Photographic materials on paper supports are typically considered to be two-dimensional or, Some exceptions include convex prints such as crayon portrait enlargements, stereoviews that are on a concave secondary support, and objects such as, Rippling/Frilling (small, tight edge distortions). Work with purpose to place photographs in the press immediately after humidification as Ultrasonic and Nebulizing machines introduce very small molecules of moisture that can dissipate quickly.
2407, graded PMG 63 Choice Uncirculated, 1918 $1,000 Federal Reserve Note - Philadelphia, Fr. Overall curl is usually along two parallel edges but can be along all four edges.
This 1865 $500 Interest Bearing Note, Fr. Wood is easily available in hardware stores: Apply several coats of topical sealer (e.g. "Archives Conservators Discussion Group 2002: Humidification and Flattening." Curled and tightly rolled items can sometimes be gently uncurled a little at a time if a deep chamber is not available. When sufficiently relaxed, apply paste around the perimeter of the paper. Physical manipulation of the fibers can occur while wet, causing fiber disruption (pilling).
dried on suction table for 6 hours (pressure?) Small areas can be humidified when the surrounding area is covered with smooth paper or blotter with thin plastic on top to protect the photograph from moisture. Generally, placing weights around a perimeter of a rigid platen will provide more even pressure overall than placing weights in the center of the platen alone. oversized objects where it is practically impossible to apply even pressure, objects with differential levels of damage, objects where inherent vice precludes overall flattening (e.g. Can leave irregular-sized water drops on the surface, Can unevenly and incompletely humidify all layers of a photographic.