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Liberty Safe
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::2013/06/27::
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2
Luzes de Segurança para Corridas e Caminhadas Noturnas - Safelight DLK Sports
Luzes de Segurança para Corridas e Caminhadas Noturnas - Safelight DLK Sports
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How to Install Better Gun Safe Lighting
How to Install Better Gun Safe Lighting
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luz prioritaria a leds SAFELIGHT
luz prioritaria a leds SAFELIGHT
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Security Safe Light,  Open your Gun Safe Dial in the dark
Security Safe Light, Open your Gun Safe Dial in the dark
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Security Safe Light Review
Security Safe Light Review
::2010/10/23::
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Safe-Light Handyman LED flashlight
Safe-Light Handyman LED flashlight
::2011/03/21::
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How to Set Up a Photography Darkroom : How to Install Safe Light in a Darkroom
How to Set Up a Photography Darkroom : How to Install Safe Light in a Darkroom
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9
Safelight-19 Teaser Trailer
Safelight-19 Teaser Trailer
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10
Build your own Automatic Safe Light
Build your own Automatic Safe Light
::2013/03/04::
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CICLOVIA VIRTUAL SAFELIGHT
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X-RAY DELUXE FLOOD SAFELIGHT
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Chivas & Jatin Kampani
Chivas & Jatin Kampani's Safe Light Party Diya Mirza,Lara Dutta
::2014/04/22::
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Security Safe Light - Open Your Safe In The Dark
Security Safe Light - Open Your Safe In The Dark
::2010/10/09::
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15
Pak-Lite, Safe-light, Pal-Light beam shots and  modes.
Pak-Lite, Safe-light, Pal-Light beam shots and modes.
::2010/02/18::
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16
Lara Dutta & Dia Mirza Among Others At Jatin Kampani
Lara Dutta & Dia Mirza Among Others At Jatin Kampani's Safe Light Event
::2014/03/24::
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17
Safe-Light PALight Survival
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::2012/05/08::
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18
Chivas & Jatin Kampani
Chivas & Jatin Kampani's Safe Light Party | Diya Mirza | Lara Dutta
::2014/03/27::
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Stunning Diya Mirza Spotted at Chivas & Jatin Kampani
Stunning Diya Mirza Spotted at Chivas & Jatin Kampani's Safe Light Party
::2014/03/25::
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20
Security Safe Light, for mechanical and electronic locks.
Security Safe Light, for mechanical and electronic locks.
::2012/02/22::
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21
Safelight Scenes
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::2012/10/28::
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22
Gun Safe Light Set Up
Gun Safe Light Set Up
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DIY Safelight
DIY Safelight
::2011/12/31::
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24
safelight
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::2012/02/08::
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Lite Tech LED Safe Light System door switch test
Lite Tech LED Safe Light System door switch test
::2012/12/01::
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Chivas & Jatin Kampani
Chivas & Jatin Kampani's Safe Light Party | Diya Mirza,Lara Dutta | CHECK OUT
::2014/03/29::
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Diya Mirza & Lara Dutta at Jatin Kampani
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Chivas & Jatin Kampani
Chivas & Jatin Kampani's Safe Light Party | Diya Mirza | Lara Dutta
::2014/03/26::
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30
AMSEC safe light,battery operated clip-on light
AMSEC safe light,battery operated clip-on light
::2011/05/06::
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::2013/05/17::
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32
Safe-Light Lantern
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Chivas & Jatin Kampani
Chivas & Jatin Kampani's Safe Light Party | Diya Mirza,Lara Dutta
::2014/03/24::
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34
Safelight w/Swivel Base Regular Ea - Flow X-Ray
Safelight w/Swivel Base Regular Ea - Flow X-Ray
::2012/08/25::
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35
Safelight 19 - WMDairsoft Video Diary
Safelight 19 - WMDairsoft Video Diary
::2011/08/15::
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36
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Liberty Safe Light Upgrade
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38
Dia Mirza at Safe Light event by Jatin Kampani
Dia Mirza at Safe Light event by Jatin Kampani
::2014/03/24::
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SafeLight: Dallas Stops on Red!
SafeLight: Dallas Stops on Red!
::2010/07/28::
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Say Yes to Safe Light!
Say Yes to Safe Light!
::2009/12/04::
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41
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::2010/08/13::
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42
Safelight w/Swivel & Optical Sensor Ea - Flow X-Ray
Safelight w/Swivel & Optical Sensor Ea - Flow X-Ray
::2012/08/25::
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43
#6 OCE SaFe Light By NeverArt
#6 OCE SaFe Light By NeverArt
::2013/11/23::
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44
gun safe light
gun safe light
::2011/04/08::
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45
Safe Light Brake Light
Safe Light Brake Light
::2013/06/06::
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46
The Making of Safelight 19
The Making of Safelight 19
::2013/05/23::
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47
Safelight auto glass... Think twice
Safelight auto glass... Think twice
::2012/03/08::
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48
Chivas & Jatin Kampani
Chivas & Jatin Kampani's Safe Light Party | Diya Mirza,Lara Dutta
::2014/04/15::
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49
Dia Mirza And Lara Dutta At Jatin Kampani
Dia Mirza And Lara Dutta At Jatin Kampani's 'Safe Light' Bash
::2014/03/25::
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50
Chivas | Jatin Kampani
Chivas | Jatin Kampani's Safe Light Party | Diya Mirza,Lara Dutta
::2014/03/25::
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From Wikipedia, the free encyclopedia
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An amber (light brown) safelight for use with certain black-and-white photographic papers

A safelight is a light source suitable for use in a photographic darkroom. It provides illumination only from parts of the visible spectrum to which the photographic material in use is nearly, or completely insensitive.

Design[edit]

A safelight usually consists of an ordinary light bulb in a housing closed off by a coloured filter, but sometimes a special light bulb or fluorescent tube with suitable filter material coated directly on the glass is used in an ordinary fixture.

Differently sensitised materials require different safelights. In traditional black-and-white photographic printing, photographic papers normally are handled under an amber or red safelight, as such papers typically are sensitive only to blue and green light. Orthochromatic papers and films are also sensitive to yellow light and must be used only with a deep red safelight, not with an amber one.[1] Panchromatic films and papers, nominally sensitive to the entire spectrum, sometimes have a region of minimum in their range of sensitivity that allows the careful use of safelight confined to that part of the spectrum, e.g. Kodak Panalure panchromatic paper, tolerant of limited exposure to light filtered through a Kodak 13 Safelight Filter.[2] Other panchromatic materials must be handled only in total darkness.

Many photosensitive materials used in technical and industrial applications, such as photoresist, are sensitive only to blue, violet, and ultraviolet light and may be handled under a brighter yellow safelight. Low-pressure sodium vapour lamps sometimes are used in larger industrial darkrooms. They emit nearly monochromatic light at 589 nm (yellow), to which the materials are insensitive; as a result they can be extremely bright while still "safe".[citation needed]

The word "safe" in "safelight" is relative, as in most cases, a sensitised material eventually will be affected by its safelight if exposed to it for an extended length of time.[3]

See also[edit]

References[edit]

  1. ^ Langford, Michael (2000), Basic Photography (Seventh Edition), Oxford: Focal Press, p. 237, ISBN 0-240-51592-7 
  2. ^ Kodak Professional Panalure Select RC Paper, Rochester, New York, U.S.A.: Eastman Kodak Company, June 2005, p. 1 
  3. ^ "Fact Sheet: SAFELIGHT FILTERS AND DARKROOM LAMP". Ilford. October 2002. Retrieved 2011-08-02. 
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