HIE Reversal Developing

[leban <HLEBANPHOT@xxxxxxxxxxxxxx>]

THE D-67 HIE-REVERSAL PROCESS

MODIFIED BY Harald LEBAN (Sep. 1997)


FIRSTDEVELOPER


D-67 HIGH SPEED

480ml   destilled Water (approx.)
2,5g            Metol
45g             Sodiumsulphit (waterfree)
5g              Hydroquinon
25g             Sodiumcarbonat (waterfree)
2,5g            Potassiumbromid
2,5ml           Potassiumthiocyanat 50%-solution
2,5ml           Potassiumiodid 1%-solution

or alternative:
AGFA NEUTOL =


495ml           AGFA Neutol (1+9)                                        =
  =

        =

 2,5ml  Potassiumthiocyanat 50% sol. (Potassiumrhodanid  50g +50mlaqua
dest.)
 2,5ml  Potassiumiodid 1% solution  (1g in 100ml aqua dest.)

BLEACHBATH =


 VARIATION A

980ml           dest. Wasser
  10g           Coppersulphate (CuSO4
20ml            Sulphuric Acid (98%)


VARIATION B

980ml           dest. Water
10g             Coppersulphate
50g             Sulphuric acid mono Potassium salt

VARIATION C

980ml           dest. Water
 10g            Potassiumdichromate
 20ml           Sulphuric Acid (98%)


CLEARING BATH

  90g           Sodiumsulphit (waterfree)
in 1l           dest. Water

SECOND-DEVELOPER

Each strong active positive-developer (Dektol, Neutol, Dokumol etc..)



FIXAGE

Not really important, ordinary filmfix is O.K.



Processing Times for HIE b&w:


In minutes at 24=F8C (equal to 77=F8F)

First Developer         10-12min
Bleach                  3-4min =

Flushing                3min
Clearing                3min
Flushing                3min   best in destilled Water 3-4 times)
Second exposure 2-3min best while flushing in water with high intensive
light =

source (halogen,sun...)
Second developing       3min
(Fixage)                3min
Final rinse             15min



FILMSPEED


In this case the reachable filmspeed depends on  =


A.)The scenery you are photographing (and light-metering so )

B.)The first developer you use

To A)

I am always metereing the scenery through the redfilter (WR25) and reach
for =

average tonal landscape a speed of 1600-3200 ASA.

If the amount of ir-radiation  parts grows up you have to set a higher
speed =

because you measure with an instrument that only "sees" "the visible
radiation =

=2E. for example forest scenes.
(3200-4000 ASA) equals a correction of minus 1 f-stop =


Very hard (for me) to get are floral sceneries in shadow where the light
meter =

shows completly different terms than the really ir-situation. Here I shot=
 =

sometimes with 6400 ASA. Equals a correction of minus 2 f-stops

But take care: these are not the "really " filmspeeds, more it is a
correction =

to the light metering with a conventional TTL light meter in order to the=

IR-
radiation.


To B)

I normally use the D67 first developer. But it works with the Neutol
version =

too. The film speeds are then lower (1/3-1/2 f-stop).

Summed up (what I used): Reversal Developing of HIE in D-67 process -
lightmeter settings - TTL through WR25

Average distant landscapes (ground, sky, clouds)                       =

1600 ASA

Scenes with higher ir-radiation (normal visible contrast)              =

1600-3200 ASA

Floral scenes (in shadow) low visible contrast                  - 6400 AS=
A


I know, this is not a very scientific definition but it works - the rest =
is

personal "bracketing".



I hope everyone can get his own advantage of this process.


CHEMICAL APPENDIX: =


Name engl.                                      Chem. Formula          =

Name german

Potassiumthiocyanate                            KSCN                   =

Kaliumrhodanid
Potassiumiodid                                  KI                     =

Kaliumiodid
Sodiumsulphite                                  Na2SO3                 =

Natriumsufit
Coppersulphate                                  CuSO4                  =

Kupfersulfat
Sulphuric acid mono Potassium salt                      KHSO4            =
 =

Kaliumhydrogensulfat
Potassiumbromid                                 KBr                    =

Kaliumbromid
Sulphuric Acid                                  H2SO4                  =

Schwefels"ure
Potassiumdichromate                             K2Cr2O7                =

Kaliumdichromat



        Good luck and take care with the chemistry

                Harold (Harry) Leban
                hlebanphot@xxxxxxxxxxxxxx



        =

*
****
*******
******************************************************
*  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  *
******************************************************

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