Re: Re air bells or" mold -looking holes "

[James Lewis/Computer Corner <lewis@xxxxxxxx>]

At 12:31 PM 6/26/97 +0500, you wrote:
>>Infrared-Digest        Thursday, June 26 1997        Volume 00 : Number 083
>>------------------------------
>>
>>Date: Wed, 25 Jun 97 18:12:27 +0100
>>From: Greg Pease <gpp@xxxxxxxxx>
>>Subject: Plus density / jobo v. hand processing
>>
>>So the last test I did solved all of my problems!  Many thanks to all 
>>that helped lead me to the solution!  I abandoned hand processing.  With 
>>this method I was getting heavy plus density on the top and bottom edges 
>>of the image area (near the sprocket holes), and funny Mold-looking holes 
>>or minus density spots.  I then went to JOBO processing which eliminated 
>>the "mold", but gave banding of uneven development running the length of 
>>the film, and still a bit of plus density.  Now I have it!  Dip & Dunk!  
>>I found a lab that has a dip & dunk processor.  The film has very even 
>>development, no plus density (most likely caused by agitation in tank 
>>development),and no "mold" (caused by air bubbles).  Yipee!  One thing 
>>though, this lab uses T-Max developer.  I have no experience with it.  
>>All of the other labs I go to use D-76.  Does anyone have oppinions on 
>>T-max developer for HIE?
>>Thanks Again,
>>Greg Pease
>>
>>
>    I have had the same problem with D-76 stock and 1:1 mixed with 
>distilled water . I get up to 1 mm diameter light areas in the negs
>primarilly in even toned areas like skies . I have been using a 5 min.
>prewash using ditilled water and 3 inversions per min. agitation in a
>stainless 4 roll tank . After each agitation I tapped the tank on the table
>and tapped the side of the tank with sissors to remove air bubbles . I
>do use the light tight lid to pour chemistry in and out including the pre-
>wash but this has not been a problem with my HC-110 dil. B .
>   Anyone else had similar problems with D-76 or other developers and
>HIE film ?
>
>Glad to be a member of the group .
>Peter Smith
>
>psphoto@xxxxxxxxxx
>Thunder Bay  On. 
>Canada
>
>
>*
>****
>*******
>******************************************************
>*  To remove yourself from this list, send:          *
>*         UNSUBSCRIBE INFRARED                       *
>*       to                                           *
>*         MAJORDOMO@xxxxx                            *
>*----------------------------------------------------*
>*   For the IR-FAQ, IR-Gallery and heaps of links:   *
>*  http://www.a1.nl/phomepag/markerink/mainpage.htm  *
>******************************************************
>
>
Air bells and the banding are some of the symptoms of inaccurate agitation.

I pre-wet my film for about a minute in ordinary tap water at the same
temperature as the developer (D-76 straight).

At one time I had trouble with dark bands running from one set of spoket
holes to the other (on the opposite side of the film). I discovered the
error was that in my zeal to dispel air bells, I was banging the tank too
forcefully on the countertop. I in effect was causing small jets of
developer to speed across the film.

As they say in 12th step programs, "Easy does it."

James Lewis
Nashville

*
****
*******
******************************************************
*  To remove yourself from this list, send:          *
*         UNSUBSCRIBE INFRARED                       *
*       to                                           *
*         MAJORDOMO@xxxxx                            *
*----------------------------------------------------*
*   For the IR-FAQ, IR-Gallery and heaps of links:   *
*  http://www.a1.nl/phomepag/markerink/mainpage.htm  *
******************************************************

------------------------------