Unexposed film stock before shooting — 35mm or 16mm rolls with virgin emulsion. Requires cold storage and prompt exposure.
Every production begins with purchasing and storing raw stock. This is your raw material before the camera even rolls — unexposed rolls of film that come in sealed cans and must remain there until they are placed in front of the lens. 35mm, 16mm, Super 8 — the size depends on your setup, but the basic rule remains: the emulsion must be protected.
What many underestimate: raw stock is a time-sensitive product. Manufacturing dates play a role. The older the stock, the more unpredictable the color temperature and color saturation, especially with color negative. Some cinematographers swear by specific batches — because they know that film 5219 in batch 42 has a slightly different contrast characteristic than batch 43. This isn't paranoia, it's craftsmanship. You store your rolls in the dark, cool (ideally 13 degrees Celsius), and above all, dry. Moisture is the biggest enemy — mold on the emulsion, and your stock is trash.
The choice of raw stock determines your visual language before the first take: Higher ISO values give you flexibility in darker scenes, but you pay with grain. Every film stock family — Kodak, Fujifilm, formerly Agfa too — has its character. Negative or reversal film? Negative is standard, giving you more leeway in post-production. But reversal? That's a completely different aesthetic — higher contrast, saturated colors, no intermediate needed.
On set itself, you must handle the raw stock properly. Cameras have film magazines that protect it — black cans, tightly sealed. Film changes take place in a darkroom or with a changing bag, never in daylight. You document every roll: number, length, stock type, shooting notes. This is your insurance in post-production when your colorist later does timing and color calibration. Every raw stock reacts differently to light and chemistry — without precise notes, editing becomes a game of roulette.
In the digital world, some productions have completely forgone raw stock. But if you're still shooting analog or want the film grain — because it simply looks like film — then you must understand this process. The quality of your final image begins with what you load into the camera.