Hypo Clearing Agent?

Strange, I had thought I sent in a post on this a few days ago.
'Parently not.

Long and short of it is, is the Hypo Clearing Agent necessary for
processing bnw film? I have a procedure from kodak that says it is, is
it? I'm usign d76 developer.

Also, I have a solution of 28% acetic acid. Where is that used in the
processing procedure?

wrote:
Strange, I had thought I sent in a post on this a few days ago.
'Parently not.

Long and short of it is, is the Hypo Clearing Agent necessary for
processing bnw film? I have a procedure from kodak that says it is, is
it? I'm usign d76 developer.

It speeds up washing by raising the pH of the film. It isn't necessary you
can just wash longer. Or you can switch to an akaline fix.


Also, I have a solution of 28% acetic acid. Where is that used in the
processing procedure?

After you dilute some it's used for a stop bath. It's also used in some
other formulas but I doubt you're worried about them.

Nick

wrote:
Strange, I had thought I sent in a post on this a few days ago.
'Parently not.

Long and short of it is, is the Hypo Clearing Agent necessary for
processing bnw film? I have a procedure from kodak that says it is, is
it? I'm usign d76 developer.

It speeds up washing by raising the pH of the film. It isn't necessary you
can just wash longer. Or you can switch to an akaline fix.


Also, I have a solution of 28% acetic acid. Where is that used in the
processing procedure?

After you dilute some it's used for a stop bath. It's also used in some
other formulas but I doubt you're worried about them.

Nick

wrote:
Strange, I had thought I sent in a post on this a few days ago.
'Parently not.

Long and short of it is, is the Hypo Clearing Agent necessary for
processing bnw film? I have a procedure from kodak that says it is,
is
it? I'm usign d76 developer.

Also, I have a solution of 28% acetic acid. Where is that used in the
processing procedure?


Before you proceed very much further, you should read up on film
developing either on the Net or in a Kodak book. Not knowing what you
are doing can ruin your film.

It's been a while since I've done any B&W, but you first develop it in
D-76, stop the developing with stop bath - the acetic acid you've got,
rinse in fixer (hypo), then hypo clearing agent, and rinse in running
water. The hypo clearing agent step can be skipped, but you have to
rinse the film a lot longer. I don't recall the times, but the
difference in rinse time is quite a bit.

Bob Boudreau

wrote:
Strange, I had thought I sent in a post on this a few days ago.
'Parently not.

Long and short of it is, is the Hypo Clearing Agent necessary for
processing bnw film? I have a procedure from kodak that says it is,
is
it? I'm usign d76 developer.

Also, I have a solution of 28% acetic acid. Where is that used in the
processing procedure?


Before you proceed very much further, you should read up on film
developing either on the Net or in a Kodak book. Not knowing what you
are doing can ruin your film.

It's been a while since I've done any B&W, but you first develop it in
D-76, stop the developing with stop bath - the acetic acid you've got,
rinse in fixer (hypo), then hypo clearing agent, and rinse in running
water. The hypo clearing agent step can be skipped, but you have to
rinse the film a lot longer. I don't recall the times, but the
difference in rinse time is quite a bit.

Bob Boudreau

On 2005-04-29 15:39:11 -0400, said:

Strange, I had thought I sent in a post on this a few days ago.
'Parently not.

Long and short of it is, is the Hypo Clearing Agent necessary for
processing bnw film? I have a procedure from kodak that says it is, is
it? I'm usign d76 developer.

Also, I have a solution of 28% acetic acid. Where is that used in the
processing procedure?

The acetic acid is a STARTING point for the stop bath and I never used
stop bath for films, only for prints. A good water rinse is perfectly
adequate for a rinse after developing. As someone else posted, you
really need to read some basic stuff on film developing if you are
asking these questions.
--
Michael Weinstein | "Those who cannot remember the
Nashua, NH | past are condemned to repeat it."
-George Santayana

On 2005-04-29 15:39:11 -0400, said:

Strange, I had thought I sent in a post on this a few days ago.
'Parently not.

Long and short of it is, is the Hypo Clearing Agent necessary for
processing bnw film? I have a procedure from kodak that says it is, is
it? I'm usign d76 developer.

Also, I have a solution of 28% acetic acid. Where is that used in the
processing procedure?

The acetic acid is a STARTING point for the stop bath and I never used
stop bath for films, only for prints. A good water rinse is perfectly
adequate for a rinse after developing. As someone else posted, you
really need to read some basic stuff on film developing if you are
asking these questions.
--
Michael Weinstein | "Those who cannot remember the
Nashua, NH | past are condemned to repeat it."
-George Santayana

wrote:

Strange, I had thought I sent in a post on this a few days ago.
'Parently not.

You did and there was at least one reply that I saw.

wrote:

Strange, I had thought I sent in a post on this a few days ago.
'Parently not.

You did and there was at least one reply that I saw.

Michael Weinstein wrote:

The acetic acid is a STARTING point for the stop bath and I never used
stop bath for films, only for prints. A good water rinse is perfectly
adequate for a rinse

Or just add some white vinegar to the water (~ 1:3) and rinse the film
with that prior to fixing.

Cheers,
Alan


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