Tech tip1 min read
The Microfilm Duplication Tree
The microfilm duplication tree: how camera negative film yields later generations with the right contrast and polarity for masters and distribution.
The duplication tree shows how later generations with the appropriate contrast and polarity for master and distribution copies are produced from camera negative film.
Highlights
- First generation: CN 1N (Camera Negative, negative)
- Second generation: LC 2N with Direct Duplicating Microfilm or MC 2P with POS Duplicating Microfilm, for distribution copies
- Third generation: HC 3P (Direct), MC/HC 3N (POS), Diazo 3N and Vesicular 3P for distribution copies
Abbreviation key
| Abbreviation | Meaning |
|---|---|
| CN | Camera Negative |
| LC | Low Contrast |
| MC | Medium Contrast |
| HC | High Contrast |
| VHC | Very High Contrast |
| 1 / 2 / 3 | First / second / third generation |
| N | Negative Polarity |
| P | Positive Polarity |
| D | Distribution |
Source:Eastman Park Micrographics(epminc.com)(opens in a new tab)
Frequently asked questions
What generation is produced from Camera Negative film in the microfilm duplication tree?
The first generation is CN 1N (Camera Negative, negative).
Which films are used for distribution copies in the second generation of the microfilm duplication tree?
For distribution copies, the second generation uses LC 2N with Direct Duplicating Microfilm or MC 2P with POS Duplicating Microfilm.
Which options are listed for distribution copies in the third generation of the microfilm duplication tree?
For distribution copies, the third generation includes HC 3P (Direct), MC/HC 3N (POS), Diazo 3N and Vesicular 3P.
What do N and P mean in the microfilm duplication tree abbreviations?
N stands for Negative Polarity and P stands for Positive Polarity.
What does the abbreviation MC mean in the microfilm duplication tree?
MC stands for Medium Contrast.
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