Just to let you know that I received confirmation from ADOX that the concentration of Adolux APH 09 has changed a bit. Whereas before you would use a dilution of 1+40, now the same time but with a dilution of 1+50 is recommented. Question: I have been using Adolux APH 09 and AODX film for a while and noticed that the name has slightly changed to include (1+50). Am I correct in understanding that from now on, a dilution of 1+50 is recommended where we used a dilution of 1+40 before? In other words, has APH 09 become just a little bit more concentrated? Answer: That's true. The dillution changed a bit. But the formula is the same.I've added a note to my development page to include the above information.