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Discussion in 'Alternative Processes' started by DonF, Oct 28, 2017.
Very nice results, thank you for sharing your process. Two questions:
Where did you get/create the bellows extension chart?
Once you have neutralized the bleach how do you dispose of it.
- I made up an Excel spreadsheet with plots for the lenses I own. I found the formula, and it was easy to make. I can send you a copy.
- After neutralizing, it goes down the drain. I called the city sewer and water department He said the quantities were minute enough to be insignificant. He also said they treat for heavy metals. Note, adding the clearing bath does not neutralize, but changes the chromium to a less toxic form.
I used a spreadsheet by Geoff Bowker for the chart. It is easily customizable.
Here is my version that generates charts in both inches and mm. It is unprotected and uses the same Excel formulas as Geoff's.