Information

Sepia toning part 2

17/04/2020
Bleach charts
To further gain a greater control over the sepia toning process, I have created a series of toning charts, one for each of the test routines that I have decided to use. These charts I now use for reference, they also help maintain consistency when producing a series of prints over a number of printing and toning sessions.
To make the charts, I cut into strips a number of spare prints, marking the bleach times on these strips while they were dry and before they were placed in the bleach. With all the strips for one sheet in the bleach at the same time in one tray, I could then remove them one by one at the correct times. The figures marked on the charts are the times in minutes indicating how long that particular strip was bleached for.
Eventually after all the testing I made ten charts, that I labelled A,B,C,D etc. I have chosen just four of them to show here, as I didn’t feel there was sufficient colour difference with the intermediate charts that would show on a website. All the test prints I used were fibre based Ilford Classic, processed in Ilford PQ developer and Hypam fix.

The following illustrations show how varying the bleach times will effect the depth and colour of the toning.
All the dilutions given below for the bleach and toning baths are made up from the stock solutions. Details of how to make up the stock solutions are in the first article Sepia toning.

Chart B
Bleach B

Chart B
Bleach: 15mls bleach in 1ltr water. Times in minutes as marked on the charts
Toning: 50mlsA 10mlsB in 500mls water. Toning time for all strips 10mins.


Chart C
Bleach C

Chart C
Bleach: 15mls bleach in 1ltr water. Times in minutes as marked on the charts
Toning: 30mlsA 30mlsB in 500ml water. Toning time for all strips 6mins.


Chart F
Bleach F

Chart F
Bleach: 15mls bleach in 1ltr water. Times in minutes as marked on the charts
Toning: 10mlsA 10mlsB in 1ltr water. Toning time for all strips 6mins.


Chart G
Bleach G

Chart G
Bleach: 8mls in 1ltr water. Times in minutes as marked on the charts.
Toning: 50mlsA 10mlsB in 500mls water. Toning time for all strips 10mins.