halation in prints

GermanB

GermanB

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I've started to do my own printng (wet darkroom), but in the first test prints I found a (dark) halo around de deep black areas but not around gray areas (at least it is unnoticeable for me), does anyone know what can cause this (undesired) effect?
could it be the enlarger lens? or overdevelopment?
I'm printing on ilford multigrade paper pearl using ilford multigrade developer, if it makes any diference. :confused:

thanks for any help :)
 
What enlarger are you using, which film?
Are you using a glass-carrier in your enlarger? - it maybe newton rings
How long are your exposure times?
Do you see those in the negatives?

Try putting some balck paper under your paper in the easel and see if it makes any difference

Demasiadas variables, un poquitin ma de informacion ayudaria mucho

Barret said:
I've started to do my own printng (wet darkroom), but in the first test prints I found a (dark) halo around de deep black areas but not around gray areas (at least it is unnoticeable for me), does anyone know what can cause this (undesired) effect?
could it be the enlarger lens? or overdevelopment?
I'm printing on ilford multigrade paper pearl using ilford multigrade developer, if it makes any diference. :confused:

thanks for any help :)
Click to expand...
 
titrisol said:
What enlarger are you using, which film?
Are you using a glass-carrier in your enlarger? - it maybe newton rings
How long are your exposure times?
Do you see those in the negatives?

Try putting some balck paper under your paper in the easel and see if it makes any difference

Demasiadas variables, un poquitin ma de informacion ayudaria mucho
Click to expand...

I'm using ilford HP5+, I cant notice it in the negatives not even under the focuser, it's a condenser enlarger don't remember the model, no glass-carrier and I'm exposing for ~9 seconds @ f16.

I'll try the black paper under the paper.

Think I forgot a lot of info, sorry :D
 
that is ok barret.

so newton rings are out of the question

Is your lens clear? if it has haze (neblina) or dust inside you could have that effect, which should be the opposite of having a hazy lens in front of your camera (bright spots look "haloed")
 
Here are some wild guesses for you.

Is your negative carrier allowing your negative to move slightly during the exposure?

Is your negative "popping" as it is warmed up by the enlarger bulb?

Is your enlarger moving slightly from vibrations in your building?

All of these movements would allow your negative to move slightly which may burn a dark ring in your black to gray transition areas of the print.

Could you post an example of the black "halo"?

Wayne
 
thanks for your input guys... yesterday was a holiday here and I had some "family business" so I had no time to chek RFF.

tajart: the enlarger comes with an original bulb, but maybe too bright 75watts

Wayne: your guesses
- Is your negative carrier allowing your negative to move slightly during the exposure?
No
- Is your negative "popping" as it is warmed up by the enlarger bulb?
Maybe, If so what can I do?
- Is your enlarger moving slightly from vibrations in your building?
Quite probable as I live in a 5th floor close to a main avenue... I'll have to print at midnight :)
- Could you post an example of the black "halo"?
I'll try to scan and post an example tonight ...

thanks again,
 
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