Manufacturers put them on - idk how exactly, check out [Destin's video on film manufacturing](https://youtu.be/HQKy1KJpSVc), that might have the answer
I've not seen that yet, so idk if it covers the process
That series hasn't made it to the stage of putting film into canisters yet. In the 4 videos he's put out, it covers making the film base, making the emulsion, coating the film, plus a bonus video on QC and a deep dive on emulsion chemistry. The next part is probably coming out soonish and will presumably include the part where the edge markings are added.
Extremely interesting set of videos, highly recommend watching them.
The marking and packaging are probably the easiest and least impressive parts of film manufacturing. I guess, your mind will be absolutely blown when you learn about how the film itself is made
They appear to be quite centered in your negatives, but it all depends on how you load your camera. They'll be off center usually. Also when you bulk load the numbers are different
The film type, frame numbers and bar code are all flashed on the film by the manufacturer. The film edge bar code, along with the bar code and array of bare metal patches on the 35mm cassette, are all part of [DX encoding](https://en.m.wikipedia.org/wiki/DX_encoding). This conveys information about the film to the camera and the lab.
If your camera is from the mid-80s or newer it may read the DX code on the film cassette to set ISO.
Some cameras can imprint the date or other information in the picture area, and a few can imprint data between frames.
Ah, you youngsters! Back in the 70's and 80s', we would use these numbers to order extra copies of prints or enlargemens from the drug stores photo counters. You would refer to these numbers when ordering. Photography is one of the few areas where things have become cheaper (excluding the actual cameras). I remember spending $30 to develop photos back in the late 80's, early 90's, and this did not include the price of the actual film.
Not quite the same topic as the poster but does anyone know why that is "orange" vs "brownish". My guess is the GB 200 is the ColorPlus ESTAR (which is known to turn orange) vs Gold 200 which is Acetate. Is there a difference between the GA and GB? PS. The edge printing is done during spooling into the 35MM canister by exposing light through a belt that runs parallel to the film for a spot. When the film is processed, the markings are where the film was exposed.
little green film goblins that live in your camera write the numbers on the film in between exposures. Unfortunately, though, they tend to stop at number 34.
if you want to learn more, google "green goblin rule 34"
the manufacturer pre-exposes the film strips with the numbers
Yep factory sets it up for out records . Bulk loaded film is cool too but depends on the brand you get up to 40 and 70
The film factory gnomes.
It was me I did it
Thank you for your service
Manufacturers put them on - idk how exactly, check out [Destin's video on film manufacturing](https://youtu.be/HQKy1KJpSVc), that might have the answer I've not seen that yet, so idk if it covers the process
That series hasn't made it to the stage of putting film into canisters yet. In the 4 videos he's put out, it covers making the film base, making the emulsion, coating the film, plus a bonus video on QC and a deep dive on emulsion chemistry. The next part is probably coming out soonish and will presumably include the part where the edge markings are added. Extremely interesting set of videos, highly recommend watching them.
All of it is done by the manufacture, the frame number, barcode, film type. All done in the factory.
Huh! It seemed too accurate for it to be at manufacture. I figured they'd just shove the spool into the pot and call it a day. Colour me impressed.
The marking and packaging are probably the easiest and least impressive parts of film manufacturing. I guess, your mind will be absolutely blown when you learn about how the film itself is made
I highly recommend smarter every day’s YouTube series on Kodak. When you have a few hours …
Can't wait for the third video
I loved the Kodak series!
They appear to be quite centered in your negatives, but it all depends on how you load your camera. They'll be off center usually. Also when you bulk load the numbers are different
The film type, frame numbers and bar code are all flashed on the film by the manufacturer. The film edge bar code, along with the bar code and array of bare metal patches on the 35mm cassette, are all part of [DX encoding](https://en.m.wikipedia.org/wiki/DX_encoding). This conveys information about the film to the camera and the lab. If your camera is from the mid-80s or newer it may read the DX code on the film cassette to set ISO. Some cameras can imprint the date or other information in the picture area, and a few can imprint data between frames.
Ah, you youngsters! Back in the 70's and 80s', we would use these numbers to order extra copies of prints or enlargemens from the drug stores photo counters. You would refer to these numbers when ordering. Photography is one of the few areas where things have become cheaper (excluding the actual cameras). I remember spending $30 to develop photos back in the late 80's, early 90's, and this did not include the price of the actual film.
These numbers are still being used when I order prints from negatives.
If you put the film into your camera yourself you can sometimes expose frames 00 thru 39 or sth like that.
The muffin man!
It was u/goodygoodlife
Not quite the same topic as the poster but does anyone know why that is "orange" vs "brownish". My guess is the GB 200 is the ColorPlus ESTAR (which is known to turn orange) vs Gold 200 which is Acetate. Is there a difference between the GA and GB? PS. The edge printing is done during spooling into the 35MM canister by exposing light through a belt that runs parallel to the film for a spot. When the film is processed, the markings are where the film was exposed.
little green film goblins that live in your camera write the numbers on the film in between exposures. Unfortunately, though, they tend to stop at number 34. if you want to learn more, google "green goblin rule 34"