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PMK

PMK+

Film

EI

70

75

80

EI

70

75

80

Agfa APX 25

16

14

11

9

25

14

11

9

Agfa APX 100

50

12

9

7

80

12

9

7

Agfa APX 400

200

13.5

10.5

8.5

320

14

11

9

 

 

 

 

 

 

 

 

 

Bergger BRF 200

100

12.5

9.5

7.5

 

 

 

 

 

 

 

 

 

 

 

 

 

Classic Pan 400

200

14

11

9

 

 

 

 

 

 

 

 

 

 

 

 

 

Efke 25

12

7

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fuji Acros 100

50

14

11

9

 

 

 

 

Fuji Neopan 1600

800

12

9

7

 

 

 

 

Fuji Neopan 1600

1600

18

15

12

 

 

 

 

 

 

 

 

 

 

 

 

 

Ilford Pan F +

32

9

7.5

6

50

9.5

8

6.5

Ilford FP4 +

64

10

8

6.5

100

10

8

6.5

Ilford HP5 +

200

13

10

8

 

 

 

 

Ilford Delta 100

64

13

10

8

100

14

11

9

Ilford SFX 200

 

 

 

 

100

14

12

9

Ilford New Delta 400

320

16

13

10

500

16

13

10

Ilford Delta 3200

800

17

14.5

12.5

800

14.5

11.5

9.5

 

 

 

 

 

 

 

 

 

Kodak High Speed Infrared

100

12

9

7

 

 

 

 

Kodak Verichrome Pan

125

9

7.5

6

200

9

7.5

6

Kodak Plus X

 

 

 

 

100

10

8

6.5

Kodak Tri-X

250

15

12

10

400

15

12

10

Kodak Tri-X Professional

250

14

11

9

320

14

11

9

Kodak T-Max 100

64

13

10

8

100

13

10

8

Kodak T-Max 400

400

15.5

12.5

9.5

 

 

 

 

Kodak T-Max P3200

3200

18

15

12

 

 

 

 

Make PMK+ by adding one-tenth (0.1) gram Amidol to one liter of PMK working solution.

Due to differences in cameras, lenses, developing techniques and exposure conditions, the above times should only be used as guidelines for your own exposures.  Always expose for the desired shadow detail and develop for the desired separation of high values.

Times given are generally for development of 120 roll film in small tanks (and may be used as starting points for tray development of sheet film), optimized for enlarging with a cold light head.  Since I presoak my film, I add 30 seconds of developing time that I do not record (assuming it takes that long for the developer to diffuse into the swollen emulsion).  My times are generally longer than those provided by Gordon Hutchings (I agitate less, optimize for cold light, and seek maximum shadow detail).

I give continuous agitation for the first 30 seconds of development, then 5 seconds of agitation every 30 seconds thereafter.  Gordon Hutchings recommends at least 3 or 4 agitations per minute to prevent uneven development in roll film tanks, but I have not had problems with my method.
(See
My Development Techniques.)

The standard dilution for PMK is 1 part A to 2 parts B to 100 parts water (1:2:100).  I have found that, as a general rule, if developing times are too long, you can double the amount of A and B solutions (2:4:100 or 1:2:50) and reduce development time to 3/5ths normal.

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