DX number

DX number
DX I2/5 barcode on a 135 film cartridge

The DX number is assigned by the International Imaging Industry Association (I3A). It uniquely identifies the type and manufacturer (sensitizer) of a film emulsion. A proprietary list of DX numbers for APS and 135 film is prepared yearly or as needed. (DX Codes for 135-Size Film, 2004, I3A). The list is available for sale from the I3A.

DX number composition

A DX number has two parts separated by a dash: the "combination code" also known as "DX Number Part 1 " followed by a "specifier number", or "DX Number Part 2". For example, Agfa Perutz 3-color 200 ISO film is assigned 115-4 (I3A).

DX barcode

For 135 film cartridges the DX number is hashed to produce a four digit code. A suffix digit for the number of exposures and a manufacturer's proprietary prefix digit are concatenated to form a 6 digit decimal code. The code is printed in human-readable text and also represented as an Interleaved 2 of 5 barcode. Size and position conform to the ANSI/NAPM IT1.14:1994 standard.

To generate digits 2 through 5, the combination code is multiplied by 16 and added to the specifier number. The result is prefixed with zeroes to make 4 digits. For the Agfa film 115-4 above, the digits would be 1844 (16 × 115 + 4).

Digit 1 is any digit from 0 to 9 and is assigned by the manufacturer.

Digit 6 is a code digit for the number of full-frame exposures: 1 is for 12 exposures, 2 for 20 exposures, 3 for 24, 4 for 36, 5 for 48, 6 for 60, 0 for 72 and 7 for non-standard lengths such as 24+3.

The barcode is located between the electrically-read silver and black DX Camera Auto-Sensing Code and the film cartridge exit lip.

The barcode is optically scanned by many film-processing machines when the cartridge is inserted for developing. (Kodak patent 5761558)

See also


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Number Six (The Prisoner) — Number Six is the central fictional character in the 1960s television series The Prisoner, played by Patrick McGoohan. In the AMC remake, the character is played by Jim Caviezel, renamed Six . In several episodes, his attempts to escape his… …   Wikipedia

  • Number Nine Visual Technology — Corporation was a manufacturer of video graphics chips and cards from 1982 to 1999. Number Nine developed the first 128 bit graphics processor (the Imagine 128), as well as the first 256 color and 16.8 million color cards.[1] The name of the… …   Wikipedia

  • Number 96 (TV series) — Number 96 Title card from a 1975 episode of Number 96. Where the cliff hanger resolution that followed this shot at the start of the episode took place in one of the building s flats, the shot of the building would zoom in on that flat as the… …   Wikipedia

  • Number 1 (Goldfrapp song) — Number 1 Single by Goldfrapp from the album Supernature B side …   Wikipedia

  • Number 1 (Tinchy Stryder song) — Number 1 Single by Tinchy Stryder featuring N Dubz from the album Catch 22 Against All Odds B side Stuck on …   Wikipedia

  • Number One — or number one abbreviated #1, No 1 is used in a variety of meanings: Numerical * 1 (number) Music * #1 , an album by Fischerspooner * Konono N°1, a musical group from Kinshasa, Democratic Republic of the Congo * No.1 , an album by BoA * #1 , a… …   Wikipedia

  • Number Ones (Janet Jackson album) — Number Ones / The Best Greatest hits album by Janet Jackson Released November 17, 2009 (see …   Wikipedia

  • Number Two (The Prisoner) — Number Two was the title of the chief administrator[1] of The Village in the 1967 68 British television series The Prisoner. More than 17 different actors appeared as holders of the office during the 17 episode series (some episodes featured more …   Wikipedia

  • Number Six (Battlestar Galactica) — Number Six Battlestar Galactica character Promotional still of Number Six in season four First appearance …   Wikipedia

  • Number 2 (Austin Powers) — Number 2 Austin Powers character First appearance Austin Powers: International Man of Mystery …   Wikipedia

  • Number Ones: Up Close and Personal — World Tour Official poster for the tour Tour by Janet Jackson Associated album Number Ones …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.