RA4 Stop Bath Question

[jabe]

I am occasionally getting some slight off yellow borders on my RA4 prints and beginning to think it is due to developer carry over into the blix. I am going to try to use a stop in between to see if this may fix the problem, but I am a bit confused on what exactly is best to use.

Is it just Kodaks Indicator Stop for BW but diluted to a different ratio? If so can anyone tell me what that would be?

My process right now is with drums:
94F
30 second Pre Wet
55 seconds - Dev + 10 second drain
55 seconds - Blix
30 second rinse x 3

Any other suggestions would be greatly appreciated!

 

[Tom Kershaw]

I use plain acetic acid at about 1.2%, which seems to work well.

 

[DREW WILEY]

It doesn't take much concentration. 1% acetic acid is plenty strong. Indicator stop bath is 28% and contains a dye, so you'd have to further dilute it considerably. I dilute mine right down from glacial acetic acid, but you have to be more careful handling the real deal.

 

[jabe]

thank you both! I am going to give it a try over the weekend, hopefully will fix the yellowing issues.