Digital BW, The Print

At 10:35 PM 8/19/03 +0000, you wrote:
>--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Alan Zinn
> > Guys,
> >
> > Weighing in on chromogenic film - you CAN process it at home.  I
>develop
> > HP5, etc. along with XP 2 in my exclusive developer for all things,
>split D76.
> >
> > This pic is an example of the latitude and fine
> > grain:  http://www.panoramacamera.us/air_support.html  It scanned
>like a
> > charm, I used almost no PS adjustments and output to piezo, quad
>black.   I
> > don't see why other developers for B/W films wouldn't work.
> >
> > AZ
>
>Alan,
>Would you care to tell us more about your split D76 film dev. process
>for XP2.
>Cheers,
>Andre
>
>


DIVIDED D-76 DEVELOPER
MIXING THE SOLUTIONS (1 liter)

Use two dark brown 1 liter storage bottles and a mixing bowl. In addition 
you need a temporary 100—mi container to mix the potassium bromide solution 
needed for the preparation of Solution A.

1% Potassium Bromide Solution:

Before mixing Solution A, you will need a potassium bromide solution. Only 
a portion will be used in mixing Solution A. The remainder is discarded.
Place the potasium bromide in the temporary container and add 100 ml of 
water - 20 C/68 F. Be sure the solution is stirred and homogeneous before use.

Solution A:

filtered water (52 C/125F)      750 ml
Metol   4g
Sodium Sulfite  100 g
Hydroquinone                       7.5 g
Potassium Bromide 1%*              30 ml
Cold water to make               1000 ml

*A 1% stock solution is 1 gm per 100 ml

To prepare Solution A, place the warm water in a mixing bowl and ad a pinch 
of sodium sulfite. This minimizes the initial oxidation of the metol - 
however if more is added at this point the metol will not dissolve. Add the 
metol and stir the solution until dissolved. It is important that all of 
the metol is dissolved before proceeding.  Then add the sulfite and, again 
stir until the solid has dissolved. Next add the hydroquinone and stir till 
dissolved. Measure the proper volume of potassium bromide solution and add 
it. It is important that only the specified amount of the 1% solution is 
added. (Do not add all of the solution that was mixed) Add water to bring 
the total volume to one liter. Pour into storage container.

Solution B:
Plain water (52C/125F)               750 ml
Borax                                 60 g
Cold water to make                  1000 ml.

Thoroughly dissolve the borax in the warm water then top-off with cold water.

USING THE DEVELOPER

Solution A is re-used and continues to work even when brown and nasty looking.
It is a pre-soak and is used at room temperature for any time from three to 
five minutes.

Solution B is used once at room temperature and discarded. The Borax is a 
common household laundry product available in five pound boxes.  The time 
in solution B controls the development and contrast. A plus or minus thirty 
second difference will not change much.

Suggested time for T-MAX or HP5 is 3.5 - 5 minutes. Use a minute less for 
slower films.

Rinse to stop development - no acid stop-bath required.
Fix and wash normally.

**END**




AZ

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