What's this stuff on my negs??

[ColSebastianMoran]

Completely different and wild guess... Mould grew on the emulsion. Washed out a shallow "crater" during processing, creating a darker spot on the print. Wild guess...

 

[Mr G]

Bob, I always use demineralized water for my d76 solution.
Did I mention that the second roll I developed in the same tank at the same time came out fine?
I can't remember if it was in the upper or lower spiral tho...

g

 

[BobYIL]

Weird.. Also if you neglect to tap such tiny air bubbles can accumulate in any reel, top or bottom. Next time let the developer wait some hours before using. Then check it if you would see floating flakes or granules settled at the bottom. If you see any, filter it and then use, by not forgetting to tap the tank a couple of times.

For developing two or more films especially in longer tanks I may recommend to pre-soak in water first for a short period enough to tap as long as you feel sure of getting rid of the bubbles, then replace the water with the developer and perform normal processing.

 

[Mr G]

Bob, thanks...
I will pre soak next time as you said.
Also, I did tap but not consistently... anyway I just finished developing another roll and it's perfect, this time I tapped like crazy =)

g

 

[Chris101]

Definitely bubbles - I have seen the exact same thing before. You said that you made the D76 and used it right away. Heating the developer and mixing the powder also dissolves air in the water. The bubbles form as the water 'outgasses'. Try this, fill a glass with hot water, and then let it cool. Look at the surface of the glass - see the bubbles? Same thing. That is why it is a good idea to let freshly mixed developer sit for an hour or so to get rid of the dissolved air as much as is possible.

 

[BobYIL]

Definitely bubbles - I have seen the exact same thing before. You said that you made the D76 and used it right away. Heating the developer and mixing the powder also dissolves air in the water. The bubbles form as the water 'outgasses'. Try this, fill a glass with hot water, and then let it cool. Look at the surface of the glass - see the bubbles? Same thing. That is why it is a good idea to let freshly mixed developer sit for an hour or so to get rid of the dissolved air as much as is possible.

So true! Even the raise of temperature may cause them... The tiny bubbles are to see in solutions waiting in such warm days after long periods, they accumulate on the walls of the bottles. I saw them several times... Probably temperature changes causing the air dissolved in water be released..

 

[cliffak]

OK, first post after lurking for a while 🙂

I just scanned a roll of Rollei Retro 100 with the same "white spot" issue. In fact, I was just going to make a post about it when I saw this.. Good to know what they are, the negs look almost like there are little "pits" in the emulsion and of course the while spots are very time consuming to fix in post.

Developed it in Rodinal 1+50, and thought I paid real good attention to smacking the tank on the floor (my bathroom is small, OK 😀 ) after every agitation. I'm always afraid of breaking it (early 1980s vintage Paterson tank) but perhaps I should try smacking it harder.

 

[Chris101]

OK, first post after lurking for a while 🙂

I just scanned a roll of Rollei Retro 100 with the same "white spot" issue. In fact, I was just going to make a post about it when I saw this.. Good to know what they are, the negs look almost like there are little "pits" in the emulsion and of course the while spots are very time consuming to fix in post.

Developed it in Rodinal 1+50, and thought I paid real good attention to smacking the tank on the floor (my bathroom is small, OK 😀 ) after every agitation. I'm always afraid of breaking it (early 1980s vintage Paterson tank) but perhaps I should try smacking it harder.

Try slapping it on the side.

 

[Mr G]

Chris thanks!
I used the developer again after a couple of days and no more bubbles...

cheers

g