Slides (35 mm)
- Placement of the emulsion side varies from one scanner to another.
- To ensure that it is against the proper face of the optical reader, follow individual scanner guidelines.
- The technician must verify the final image by comparing the original slide with the digitized version.
- Batch digitization enhances productivity, but does not offer optimal rendering of individual images.
- Verify the film type. If the scanner offers this option, select the appropriate film profile and apply it to the digitization session.
- Ideally, the colour scale used should be identical to the film type (e.g., Fuji film digitized using a Fuji scale).
- If the type of film is unknown, do test scans to optimize digital rendering of the image.
- Do not scan the slide mount. However, if valuable information is inscribed on it, follow the Lantern Slide procedures and remarks.
- 300 ppi, with a minimum of 3,000 pixels for the longest measurement (8 x 10, or 1:1 for formats larger than 8 x 10).
- Refer to the general guidelines to calculate the number of ppi required for a given dimension.
Note that it is the original document which measures 8 x 10, not the final digital file.
- Digitize in transparency mode.
- For reference purposes, digitize a transparent colour scale (on film) before each digitization session.
- If the slide allows, reframe the image in a way which preserves the border and any notations found there.
- Balance the white levels in the whitest zone (D-Max), then balance the black in the blackest zone (D-Min).
- Convert in Adobe RGB 1998 profile, 8 bits per channel (total 24 bits).
- Save the image as an uncompressed TIFF, named to standards established by the Corporation's Photo Archives.
- Produce a JPEG version as described in the general guidelines.
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