HELP problem of contrast with durst cls 450 HELP
I have a big problem
I debute silver print
I have a durst laborator900 with a cls450 color head
it been 2 years since I tinker and learn by himself at home, but without much success
In fact I can not get a satisfactory contrast in my prints , there is always like a gray veil
contrast is not correct
even a grade 5 on scale of ilford and of durst ... and even fiddling
a remedy for all that I have done two things
change my bulb
take courses in enlarging at a camera club near my home
and they said me that i have the basics of technique, I can do beautiful contrasts with masking adequate and more with my own negatives
but impossible to replicate at home
is my enlarger is dead but I do not think because its appearance is nice .... like new
or I do not know how to use it
and I rather think that is the case c
so I ask for help
... thank you in adavance
Two things spring to mind:
Originally Posted by amaury217
Poor safelight - Have you done a check to see if it is truly safe and that there are no light leaks in your darkroom ?
Are you using fresh, new paper - Old papers that have been stored badly can often show the effects you describe.
normaly my darkroom is totaly safe i think it is my bathroom there is no windows and now light through the door
and i use a photographic red bulb
and i use new products ilford
ilford multigrade paper developer paper
ilford multigrade 4 rc deluxe pearl
Last edited by amaury217; 11-03-2013 at 05:44 PM. Click to view previous post history.
i make a light test just now
a paper in the darkroom with only the safe light during 5 min
after developpement it stay white
That is not a good safelight test as it does not account for the additive exposure of safelight plus print exposure. Do a proper safelight tests by following instructions from Kodak or Ilford.
Also check for other sources of fogging: light leaks from enlarger etc. These are sometimes less obvious unless you first turn off all lights, let your eyes adjust to the dark and then turn on the enlarger.
If there is low contrast without fogging check the temperature of your developer, development times.
Sponsored Ad. (Subscribers to APUG have the option to remove this ad.)
Perhaps you are pulling your prints out of the developer too soon--that could produce the effect you're complaining about. Try exposing your prints so that they need two or more minutes of developing time. Pulling prints out of the developer tray when they look right under the safelight is a common beginners' error.
thank you for your answers
I will move my safelight is currently above my developer tank
and I'll let my paper longer in the developer for now I let 1 minute 30
I try and I tell you again
If you are developing your prints for 1 min. 30 sec. longer development might produce a slight improvement, but your real problem is likely something else. Could there be a problem with your color head? Perhaps you could obtain some under the lens VC filters and try those instead.
Potential problems should be eliminated one by one. Based on the "grey veil" description by OP, it isn't entirely clear to me whether he's just experiencing low contrast, or an actual fogging. I'm assuming (perhaps incorrectly) there is fogging, in which case over/underdeveloping is not going to improve things.
Rule out fogging (from safelight or enlarger) first with a proper safelight test etc. If non-image light is completely ruled out, then look for other problems which could lead to low contrast and/or veiling. Check that processing is as per Ilford instructions (including fixation - incomplete fixing, overused fixer). Then look for problems with the enlarger. In addition to potential filtration issues, it could even be something like a dirty lens.
ok i check all of that
and i tell you
thanks a lot