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Humidification and Flattening

Before Treatment        

 

During Treatment

       

 

After Treatment

 

Treatment Report

Microsoft Word Version

Item: 06-103

Date:   11/15/2006

Conservator:  Brenna Campbell

Instructor: Karen Pavelka

Custodian:  Center for American History, University of Texas at Austin

Curator:  Stephanie Malmros

Description: Rolled Silver Gelatin Photograph

Treatment Objective

To enable the photograph to be safely handled, viewed, and stored.

Description and Condition

Approximate dimensions: (8” x 10”) (precise length uncertain)

The silver gelatin print appears to be in good condition.  The photograph was rolled, emulsion-side in, possibly for storage.  Less than ¼ of the length of photo is exposed.  The photo appears to have been developed onto a medium-weight white paper of fairly good quality.  Although the photo cannot be unrolled, small areas of the image can be seen by looking down the inside of the roll, and by examining the outer edge of the roll, which can be opened very slightly.  In these visible areas, the baryta layer appears intact, and the emulsion layer seems to be in generally good condition.  No major creases, tears, or losses are visible.  Small dents and folds occur on the corners, and along some edges. The inside of the roll appears to be rather dusty, but it is not clear whether this dust has damaged the emulsion layer.  A rather large (roughly 1 cm) spot of what appears to be adhesive is visible roughly 3.5” in from the top margin.  Paper fibers remain attached to this adhesive spot, suggesting that the photograph may have at one time been mounted onto a sheet of light-grey paper.

Treatment Proposal

  1. Humidify and flatten the photograph.
  2. Rehouse in suitable housing.

Estimated Treatment Time:  1 hour

Possible Effects of Treatment

Exposing the photograph to moisture in the humidity chamber could soften the emulsion and potentially alter the surface quality upon flattening.  The emulsion layer, if not humidified sufficiently could crack when the photograph is unrolled.  Additionally, much of the photograph is not accessible, any obscured media cannot be tested for water solubility—there is a potential that such media, if it exists, could bleed or halo during humidification.

Treatment Notes

After flattening, the emulsion layer appeared to be in fairly good condition, although its surface has been disturbed by drops of water at some point in the past.  A small crack in the emulsion layer at the lower left corner was consolidated with gelatin.

Treatment Procedure

  1. Humidified the photograph in a humidity chamber (3 hours)
  2. Dried between boards and blotters
  3. Consolidated crack with gelatin (15 minutes)
  4. Housed in a mylar sleeve (1 side closed)

Treatment Time: 3 hours 15 minutes

 

 

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