wschwetz
I have some questions about FX-39
?
The data sheet states that FX-39 II increases sensitivity; however, the development times make no mention of a different ISO setting. So, would an FP4 be exposed at ISO 125 and then developed for 6 minutes in a 1+9 solution of FX-39 for a y value of 0.65? Correct? For mixed light at y 0.7, I’d guess that’s 10% more?
The times given in the data sheet differ significantly in some cases from the old Paterson data sheet. Should I just throw that one away then?
If you’re shooting low-contrast subjects, does it make sense to dilute the developer less? And how would I need to adjust the development time? Unfortunately, there’s nothing about this on the adox.de website.
Urnes
So, ‘sensitivity-boosting’ means you actually get the 125 ISO out of it.
I’d skip the 10% boost. The standard development time is sufficient even for mixed lighting. With FX-39, I don’t use a boost. In comparison to A-49, where I use a 10–15% boost.
Regards, Sven.
