Ensuring proper fix time

[Compaq]

I got a tip some months ago to help me ensure the proper fix time. When I start the fixing process, I add some fix solution to a small cup with the tip of my film in. When that has become transparent, or blank, the process is done. It's annoying to have negs that are milky.

Is this "common practice"? 🙂

 

[RomanV]

Yes, it's the right way to check is your fixer still alive. Just don't forget to measure the "cleaning" time and then multiply it at least by 2 (for sodium thiosulfate based fixers) or by 3 (for ammonium) and you will know the exact time for fixing in this particular soup...

 

[Roger Hicks]

It can be difficult to say exactly when the film has 'cleared'. Gp to http://www.rogerandfrances.com/subscription/ps how process 35-120.html and scroll about 3/4 of the way down. There you'll see a 'spot test' that makes it easier to determine.

Over-fixing, incidentally, is a very small risk. Five minutes, when the film clears in 15 seconds, will do no harm. Longer fixing will also help remove the pink stain seen in some films. VERY long fixing (such as 10 minutes with a clearing time of 20 seconds) may however result in degradation of thin areas of the negative.

Cheers,

R.

 

[tj01]

I usually use two strips one after another for film . For paper, always use fresh fixer

 

[lam]

I usually use two strips one after another for film . For paper, always use fresh fixer

This.

I usually use a small cup for new unfamiliar film, or new batch.

 

[kokoshawnuff]

I always check my negatives after about 5 min. If they need more time, I give it to them.

 

[Murchu]

I got a tip some months ago to help me ensure the proper fix time. When I start the fixing process, I add some fix solution to a small cup with the tip of my film in. When that has become transparent, or blank, the process is done. It's annoying to have negs that are milky.

Is this "common practice"? 🙂

Sure, drop the tip of the film in the fixer, see how long it takes to go clear, and then double it for good measure. Works for me, and never had any issues with underfixing. At least thats been my personal experience, but don't proclaim to know much as to the technical elements of the process. I like Rogers addition of the spot.

 

[Compaq]

Roger, that link was very helpful! Thanks for sharing.

To all others: Everyone agree on doubling the clearing time "for good measure". I have not been doing this, but will start practicing it! Most likely that was part of the tip I got, but it must have traveled straight through my head.

Thanks again, folks! I appreciate it!