Film knowledge base: 16mm, 35mm and archives

Practical guidance for longer analogue productions and large film collections. These answers cover processing, scan specifications, archive preparation and delivery. Use them to prepare a brief for our London cine lab, then agree the details for your material with the team.

Explore 16mm film services, 35mm film services, Super 8 film services and archive film scanning. Ready to plan a project? Request a detailed quote.

Processing and stock choices

What is the difference between processing and scanning?

Processing uses chemistry to develop images recorded on exposed photographic film. Scanning captures images from developed film as digital files. Fresh camera film normally needs processing before scanning; an already-developed archive reel needs assessment and scanning rather than developing again.

Which processes does the lab provide?

Our Calder processors provide ECN-2 colour-negative and D96 black-and-white negative processing. The correct route depends on the stock and intended result. Include the stock name and code in your enquiry and check unfamiliar material with the lab before sending it.

Can you process Kodak motion-picture film?

We provide motion-picture negative processing for compatible Kodak stocks. Give us the exact stock, format and footage so we can confirm the service. Kodak makes different film types; the stock and intended result determine the appropriate process.

Is negative processing the same as reversal processing?

No. Negative and reversal workflows produce different results. Cross-processing a suitable reversal stock as a negative changes the result and does not produce the normal projectable positive. If you want to project the original, discuss the stock and processing route before booking.

What information should accompany a production’s rolls?

Prepare a roll list with the production name, unique roll references, stock, format and footage. Keep identifiers consistent on the cans and paperwork. Include any exposure or processing instructions and agree special requirements in advance. Exposed, undeveloped film must remain protected from light.

Can I send vintage or unidentified 16mm film for processing?

Vintage 16mm processing is not offered. Contact us with the markings and history before sending unidentified material. Old film that has already been developed may instead be suitable for scanning, subject to condition and assessment.

How should I plan tests and special processing?

Discuss camera or stock tests before committing the main shoot. For a processing variation, explain the intended result and identify the affected rolls clearly. Availability, timing and the agreed instructions should be settled before processing.

Scan specifications and post-production

Which scanners are used for 16mm and 35mm?

We use a Lasergraphics Archivist for 16mm at resolutions up to 5K and a Blackmagic Cintel for 35mm in 4K. Small-gauge film is scanned on a Film Fabriek Mueller HDS+ at resolutions up to 4K. Confirm the precise delivered specification for your material and workflow.

Does a higher-resolution scan always reveal more detail?

A larger scan can preserve detail and grain present on the film and leave room for reframing. The result also depends on the stock, lens, focus, exposure, film condition and scanning setup. More pixels cannot recover detail never recorded. Discuss a representative test for a large collection.

What does 4K or 5K mean for the files I receive?

These terms describe resolution families, not a complete delivery specification. Agree actual pixel dimensions, framing, codec and playback frame rate. A cinema-format scan need not have the same dimensions or aspect ratio as a UHD television image.

What is an overscan?

Overscan includes area beyond the intended picture frame, potentially showing frame edges or perforations depending on the setup. It can leave room for reframing or stabilisation. A cropped version trims that surrounding area. Agree available framing and final delivery before scanning.

Should I choose a one-light or best-light approach?

A one-light approach uses a common scan setting and leaves scene variations for post-production. It can suit projects whose colourist will finish the images. A best-light approach balances exposure and colour where needed for a more immediately viewable result. Neither term alone specifies a codec, log encoding or RAW file.

What files should I request for post-production?

Start with your editor or colourist’s requirements. Our 8mm and 16mm services offer ProRes HQ, with ProRes 4444 options; confirm availability for your particular scan and format, especially for 35mm. Specify resolution, framing, frame rate and colour treatment together.

Can scanning remove movement or damage?

Movement can come from camera registration, film condition or scanning. Digital stabilisation can reduce some movement but may need cropping. Cleaning, scanning and digital restoration are separate decisions. Explain the problem and agree the scope rather than assuming a scan includes complete repair or restoration.

Preparing a large film archive

What should an archive inventory contain?

Give each reel a unique reference and record available information: gauge, can or reel size, estimated footage, title or date, element type and label text. Note uncertainty rather than guessing. Keep the same references in enquiries, packing lists and digital filenames.

Must every reel use the same scan specification?

Not necessarily. A mixed collection can contain different gauges, elements and conditions. Define intended use first, then discuss suitable specifications. Record agreed common requirements alongside any exceptions where consistency matters.

How can we start a large collection in manageable stages?

Identify priorities and representative reels, including different formats or conditions. Discuss an initial assessment or test batch. Agree batch order, naming conventions and review points so findings from the first material can inform later work.

What if reels are brittle, warped or unidentified?

Tell the lab before transport. Use existing labels, records and external photographs to describe the material; do not run fragile film through a projector just to inspect it. Acceptance and handling must be agreed for damaged, shrunken or uncertain-base material. Suspected nitrate needs specific discussion before sending.

What about sound and restoration?

Record any known soundtrack type and whether sound capture, synchronisation, grading or restoration is required. These need an agreed scope. The presence of sound on a film does not establish that every scanning option includes its transfer.

What makes a useful archive delivery brief?

State intended uses and required resolution, framing, format and colour treatment. Include naming, catalogue links and any metadata or checksum requirements for review. Specify editing masters, access copies or other preservation deliverables and agree availability and cost before work starts.

What happens to the original collection?

Agree return or collection arrangements and retain the inventory linking originals to files. Digitisation does not make physical film redundant. Plan appropriate ongoing storage for originals and independent digital backups; transfer links are not permanent storage.

Scheduling, delivery and original reels

How much time should a larger project allow?

Tell us the shoot schedule, edit dates, total footage and staged delivery requirements. Processing, preparation, scanning and file transfer all contribute to timing. Agree a project schedule rather than applying a small online order’s turnaround to an entire production or archive.

Can a project be delivered in batches?

Include that requirement in the enquiry. Explain which reels are priorities and how each batch will be reviewed or used. Agree batch sizes, naming, transfer method and timings before work starts.

How large will the scan files be?

File size depends on running time, pixel dimensions, frame rate and codec. Reel count alone is not enough to select a drive. Ask for an estimate based on the agreed specification and allow space for backups and working files.

Will files arrive by download or drive?

We use online transfer for many jobs; larger archives or substantial data deliveries may need a storage drive. Agree method, capacity and compatibility in advance. Check internet capacity and available disk space before planning a large download.

How should a supplied drive be prepared?

Discuss the drive specification before sending it. Supply a clean device, preferably new or freshly reformatted. Our guidance recommends exFAT for Mac and Windows compatibility with large files. Back up anything needed before formatting, which erases existing contents.

What should I do after receiving files?

Download or copy the delivery promptly, check it against the reel inventory and inspect the files in your intended software. Keep independent backups and report missing or unexpected results promptly. Do not rely on a transfer link as the only copy.

When will the original film be returned?

Agree return shipping or collection as part of the project. Tell us before booking if you need originals by a particular date. Review, rescan and return arrangements should be clear in the quotation.

Discuss your production or archive

Request a detailed project quote with your format, footage, material type and schedule, or contact our London film lab for help identifying the next step.