Gast
Hello,
First of all, it’s of course great that you’re providing us with these figures.
However, prompted by Horsch’s question regarding Np 20 times, I dug out a few older developer guides and, whilst looking through them, also noticed that the times given there for the Efkes (some of which are still ADOX specifications) are consistently shorter than those in your table.
For example, for d 76 (not officially from Kodak) 1+1 and ADOX KB 17, 8 minutes, compared to 12 minutes in your table for ID 11, etc.
This also matches my own experience; in my opinion, the times for ID 11 are really too long, so that the negatives end up quite hard and do not allow for a reasonable reproduction of the clouds.
According to your specifications, should one reduce the exposure by one stop compared to usual, or why else are there these discrepancies?
Roland
MirkoBoeddecker
Hello Roland,
It’s always a bit of a tricky business with development times.
Just yesterday, someone was in the shop saying that all the development times were far too short……
It really depends on a lot of factors. Water temperature, agitation rhythm, thermometer, etc.
Generally speaking, we actually tend to err on the side of the shorter end of the scale with the efkes.
The figures from 1960 are really no longer up to date – even though the efkes are based on the original ADOX patents, they have been modified in many ways to allow the use of newer chemicals and raw materials.
But my tests with D76 date back to the early 90s.
If more users think they’re too long, I’ll be happy to revise them.
Best regards,
Mirko
Wolfi
Hello,
Does anyone happen to know how long you need to develop an Efke KB 25 in Agfa Rodinal Spezial (stock solution)?
Many thanks.
Best regards,
Wolfgang
