Posts tagged ‘splicing’

May 19, 2011

The splicer looks a lot like this:

May 11, 2011

splicing and adding film leader

(Safety first!)

To protect the information (the images) on the microfilm, we will add lead (blank, archival quality film) to the start of film rolls that do not have adequate leads. This way, if any damage is done to the first few inches of a film, the risk is (hopefully) only to blank frames, not frames with information. In the scope of the Dumbarton Oaks project, we want to make sure all our microfilm have at least a lead of 12 inches (longer preferred but 12 inches sufficient).

If you pull a film without a long lead:
1. measure at least 12 inches of clear film leader and cut (preferred method for cutting: align leader in the splicer using the pins, then slice with the guillotine on the right-hand edge of the splicer to ensure a straight vertical cut)

2. if the film does not have a straight vertical edge but can be trimmed without losing information, use the splicer guillotine to make a straight, vertical cut in the same way

3. if the film does not have a straight vertical edge but trimming it would risk information, do not cut it but carefully overlap the minimal amount of the film with the leader

4. align the leader and film edge in the splicer using the pins; the join should occur approximately in the center of the “matrix” in order to fall under the tape when you operate the splicer

5. make sure the tape is aligned with the join, then pull it across the full width of the matrix without touching the film (excess tape at the top edge will be cut off when you operate the splicer but try not to create too much excess)

6. when properly aligned, press gently down on the tape to secure it to the film and leader; we recommend that, when you first touch the tape down to the film, you move your finger from one edge of the tape to the other in order to prevent air bubbles or wrinkles (like a squeegee)

7. once the tape is in position, remove your fingers from the matrix and pull the black handle all the way down; this should cut the tape along the top and bottom edges of the film

8. gently remove and inspect the spliced film

9. if satisfied, turn the joined film over and follow the appropriate steps to add a piece of splicing tape to the reverse side

Please be very careful handling the splicer because it has a number of sharp blades (guillotine on the right-hand side as well as the blades attached to the splicing plate) along with perforating pins (also attached to the splicing plate)

May 11, 2011

repairing small tears in film

Use the splicer to apply splicing tape in the area of the tear on both sides of the film.

In the database entry, under “Conditions of Microfilm,” note “film torn – repaired with splicing tape

In extreme cases or if it does not appear that simply adding splicing tape will solve the problem completely, please consult with Deb or Sarah.

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May 11, 2011

deteriorating tape

Some of our older film have been spliced together with tape that is now yellow and brittle. If you can remove it gently without damaging information (images on the film), then please feel free to take some of it off but do not risk the film’s contents or integrity.

Use the splicer to apply a new piece of splicing tape over the old join(s); please do this to both sides of the film.

Feel free to  bring extreme cases to Deb or Sarah for further consultation.

In the database, note “brittle tape” or “yellowed tape” in the “Condition of Microfilm” field, and add “new splicing tape applied”