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#1
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eseco compumaster...HELP!
Can anyone tell me how to use my densitometer to read film? If not, Can
you tell me what would make the base of the film be lighter than it should be? The end of the film is in the light before processing. It is usually black after processing. Now it's brown. The odd thing is, one roll will look good, then the next one will look really weak and the exposed tab will be brown. Does it sound like under replenishment, or over replenishment? Or maybe it's weak developer? I use an Agfa msc 101 minilab machine, by the way. thanks |
#2
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eseco compumaster...HELP!
In article . com,
"DNT" wrote: Can anyone tell me how to use my densitometer to read film? D-max up to 3.0 (Although no one in their right mind cooks film this dense) D-min .15 maybe as low as .07 for clear developers. If not, Can you tell me what would make the base of the film be lighter than it should be? The end of the film is in the light before processing. It is usually black after processing. Now it's brown. The odd thing is, one roll will look good, then the next one will look really weak and the exposed tab will be brown. Does it sound like under replenishment, or over replenishment? Or maybe it's weak developer? I use an Agfa msc 101 minilab machine, by the way. thanks The base of unexposed film is supposed to be clear. If your getting "brown" fully exposed areas the developer is A) Too weak or B) the transport speed is set too fast. -- Reality-Is finding that perfect picture and never looking back. www.gregblankphoto.com |
#3
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eseco compumaster...HELP!
"DNT" wrote in message oups.com... thanks Greg, It's the end of the film that is exposed to light that is brown instead of black. The info about weak developer is helpful, however. My question about the densitometer was referring to the device itself. Right now I use it to read my paper tests, but I don't know how to switch the densitometer to the film reading mode. The buttons on the unit are as follows: 2 rows of 3, and 1 row of 2. Starting at the upper left button the buttons are labeled- select filter, zero, cal, EP2/RA4, C-41, printer control, read/enter, reset. I know the film process is C-41, so I assume I would press that button, but after that I have no idea. Greg "_" wrote: In article . com, "DNT" wrote: Can anyone tell me how to use my densitometer to read film? D-max up to 3.0 (Although no one in their right mind cooks film this dense) D-min .15 maybe as low as .07 for clear developers. If not, Can you tell me what would make the base of the film be lighter than it should be? The end of the film is in the light before processing. It is usually black after processing. Now it's brown. The odd thing is, one roll will look good, then the next one will look really weak and the exposed tab will be brown. Does it sound like under replenishment, or over replenishment? Or maybe it's weak developer? I use an Agfa msc 101 minilab machine, by the way. thanks The base of unexposed film is supposed to be clear. If your getting "brown" fully exposed areas the developer is A) Too weak or B) the transport speed is set too fast. -- Reality-Is finding that perfect picture and never looking back. www.gregblankphoto.com What brand and model is your densitometer? Since you already use it to read prints, it is a "reflection" densitometer; that is, it shines a light on the paper and reads the light reflected from the paper to the sensor. To read film, you need a "transmission" densitometer that shines a light thru the film to the sensor. Does your dens. have a switch to change from one to the other? Have you done a web search on the make and model? You may be able to find online instructions. Ken Hart |
#4
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eseco compumaster...HELP!
In article .com,
"DNT" wrote: thanks Greg, It's the end of the film that is exposed to light that is brown instead of black. The info about weak developer is helpful, however. My question about the densitometer was referring to the device itself. Right now I use it to read my paper tests, but I don't know how to switch the densitometer to the film reading mode. The buttons on the unit are as follows: 2 rows of 3, and 1 row of 2. Starting at the upper left button the buttons are labeled- select filter, zero, cal, EP2/RA4, C-41, printer control, read/enter, reset. I know the film process is C-41, so I assume I would press that button, but after that I have no idea. Greg "_" wrote: If you call Eseco they can provide a manual for many older densitometers. Should be able to find via Googling. That said: & based on my TR30 I believe the round black knob(s) on the specific probe turns the probe on or off. (Only based on another model Eseco) -- Reality-Is finding that perfect picture and never looking back. www.gregblankphoto.com |
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