Last Updated 2 months ago
Definition
Interpositive (IP) and Internegative (IN) are intermediate film elements used in the photochemical duplication process to create release prints without directly wearing down the original camera negative. Together, they form the backbone of traditional film duplication, preservation, and large-scale distribution workflows.
An interpositive is a positive image created from the original camera negative. An internegative is a negative image created from that interpositive. Release prints are then struck from the internegative rather than from the original negative itself.
Why Intermediates Exist
Original camera negatives are irreplaceable. Every time a print is made directly from a camera negative, that negative is physically handled, threaded, and exposed to mechanical stress. Over time, this causes damage—scratches, dirt, tears, and image degradation.
Interpositives and internegatives exist to solve this problem. They allow studios to:
Preserve the original camera negative
Create multiple generations of release prints
Standardize color and density
Replace damaged printing elements without reshooting
In short, intermediates protect the source while enabling mass duplication.
The Traditional Film Duplication Chain
In a classic photochemical workflow, the process typically follows this order:
Original Camera Negative (OCN)
Interpositive (IP)
Internegative (IN)
Release Prints
Each step serves a specific purpose.
The interpositive is used as a controllable master. Color timing, density adjustments, and corrections are often finalized at this stage.
The internegative is the workhorse printing element. Multiple INs may be made from a single IP to support large theatrical runs across different regions.
Interpositive (IP) Explained
An interpositive is a positive image—meaning it looks visually “correct” when viewed, unlike a negative. It is created by contact-printing the original camera negative onto intermediate film stock designed for stability and fine grain.
Key characteristics of an interpositive:
Positive image (normal contrast and orientation)
High image quality with minimal generational loss
Used for color timing and approval
Handled far more often than the camera negative
Once the interpositive is approved, it becomes the reference point for all subsequent duplication. If something goes wrong later in the chain, the IP can be used to generate a new internegative without returning to the original negative.
Internegative (IN) Explained
An internegative is a negative image created from the interpositive. It matches the tonal and color decisions locked into the IP and is optimized for printing large numbers of release prints.
Key characteristics of an internegative:
Negative image suitable for printing
Designed for durability and repeated use
Often duplicated multiple times for wide distribution
Sacrificial compared to the IP and original negative
If an internegative becomes damaged, scratched, or worn out, it can be replaced by creating a new one from the interpositive.
Color Timing and Creative Control
One of the most important roles of the interpositive is color timing. Before digital color grading existed, all creative color decisions were made photochemically.
During IP creation, color timers adjusted exposure and filtration to balance:
Skin tones
Day vs night scenes
Interior vs exterior scenes
Contrast and density consistency
Once approved, these decisions were baked into the IP and carried forward into every internegative and release print. This ensured visual consistency across theaters.
Archival and Preservation Use
Interpositives and internegatives are critical to film preservation. Archives often store:
Original camera negatives
Interpositives as preservation masters
Internegatives for access and projection
In some cases, the original negative may be too fragile or incomplete to use. An interpositive may become the best surviving representation of the film. Preservation workflows frequently rely on IPs and INs as starting points for restoration, scanning, or reconstruction.
Internegatives vs Release Prints
It’s important not to confuse internegatives with release prints.
Internegative:
A negative element used to make prints.
Release Print:
A positive print designed for projection in theaters.
Release prints are subjected to the most wear—projection, shipping, scratches, dirt, and heat. Internegatives are kept in controlled environments and handled carefully to maintain consistency.
Digital Era Context
With the rise of digital intermediates (DI), the traditional IP/IN chain is less common for new productions. Today, many films follow this path:
Original Negative or Digital Capture
→ Digital Scan
→ Digital Color Grade
→ Digital Cinema Package (DCP)
However, interpositives and internegatives still matter:
They are essential for restoring older films
They remain part of archival best practices
They are reference standards for photochemical quality
Some productions still choose film-out workflows
When a modern film is scanned from an interpositive rather than the original negative, it is often because the IP is safer, more complete, or better preserved.
Common Misunderstandings
A frequent misconception is that interpositives and internegatives reduce quality significantly. In reality, high-quality intermediate stocks were engineered to minimize generational loss. Properly made IPs and INs can retain remarkable detail and stability.
Another misunderstanding is that intermediates are obsolete. While digital has replaced them in most commercial workflows, they remain foundational to film history, restoration, and archival science.
Why It Matters
Interpositives and internegatives are invisible to audiences, but they are fundamental to how cinema was distributed for most of its history. Without them, wide theatrical release would have destroyed original negatives within months.
For filmmakers, archivists, and restoration professionals, understanding IPs and INs explains:
Why certain versions of films exist
Why some restorations look better than others
How color and contrast decisions were historically locked
Why preservation is a multi-generation process
They represent a system built around durability, control, and respect for the source image—principles that still inform best practices today, even in a digital world.
Frequently Asked Questions
Is an interpositive the same as a release print?
No. An interpositive is an intermediate element, not intended for projection.
Can you make release prints directly from the camera negative?
Yes, but it is avoided to prevent damage.
Are internegatives still made today?
Rarely for new productions, but frequently for archival and restoration work.
Which is more important to preserve: the IP or IN?
The interpositive is usually more important, as it can generate new internegatives if needed.
Related Terms
[Original Camera Negative] The film exposed in the camera during shooting.
[Release Print] A positive print made for theatrical exhibition.
[Film Restoration] The process of repairing and preserving motion pictures.
[Digital Intermediate] A digital workflow that replaces photochemical intermediates.