B&W Slide Film?

AshleyC

AshleyC

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I can see some 35mm b&w slide film available but just wondered if there is a supplier of MF or 5x4 versions? Anyone ever got any?
 
I have reverse processed many Pan F and FP4 films using home brew chemicals. It is basically the same as the process which Ilford publish but they use their own developers. The results have always been of good quality. There is no need to worry about the sulphuric acid, it is very dilute.
 
Kevin Allan said:
I don't think there is any B&W slide film available in sizes larger than 35mm but Ilford publish details of how to reversal process other films such as Pan F, FP4, or Delta 100:

https://www.ilfordphoto.com/wp/wp-content/uploads/2019/06/REVERSAL-180619.pdf

I've never tried this myself. The use of sulphuric acid does put me off a bit.
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The instructions about the concentrated sulphuric acid are flawed in that they don’t make clear that it’s important to add the the acid to the water and not the other way round.

The small quantities involved may mean it’s safe but sulphuric + water is exothermic and it may boil explosively.

I used to use this method or one closely similar regularly in the 60’s for reversal BUT I also used tho use the same sulphuric acid preparations at work in lab conditions.

Provided you add the acid to the water while mixing them it should be entirely safe especially with the small quantities involved. The danger might come from scaling up to make bigger batches.

The reversal results were well worthwhile but whether they still are with digital processing depends on the final use I guess.
 
David_Mug said:
I just buy 10% sulphuric solution and go from there.
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Indeed, that would be perfectly safe. It’s only messing around with concentrated that’s tricky and even that is OK if you know what you are doing.
 
Just as a point to consider, some films - very few in number - have clear bases, making them a good fit for reversal processing.

As an alternative - produce a negative, scan and reverse to positive, then print on transparent film as sold to make negatives for contact printing.
 
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