Slides (35 mm)

Notes

• 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.

Remarks

• 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.

Procedures

• 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.

Recommendations

1. 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).
   

   

2. 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.
3. Digitize in transparency mode.
4. For reference purposes, digitize a transparent colour scale (on film) before each digitization session.
5. If the slide allows, reframe the image in a way which preserves the border and any notations found there.
6. Balance the white levels in the whitest zone (D-Max), then balance the black in the blackest zone (D-Min).
7. Convert in Adobe RGB 1998 profile, 8 bits per channel (total 24 bits).
8. Save the image as an uncompressed TIFF, named to standards established by the Corporation's Photo Archives.
9. Produce a JPEG version as described in the general guidelines.