TMY2 120 Film Base

[c6h6o3]

Has anyone other than me noticed small, crescent shaped crinkles forming in their 120 TMY2 as it dries?

 

[tomalophicon]

Nope

 

[fschifano]

Nope, never. Even if I've horribly mistreated the film I haven't seen it. But crescent shaped crinkles you say? Very common if you've creased the film while loading the tank. Sometimes they're not too obvious when the film is wet, and become more so as the film dries.

 

[R gould]

Sounds like damage to the film base, probably done when you loaded the film into the tank, easy to do if the first load goes wrong and you have to start again, I find that the Patterson tanks and reels are the easiest to use to avoid the damage,Richard

 

[c6h6o3]

Sounds like damage to the film base, probably done when you loaded the film into the tank, easy to do if the first load goes wrong and you have to start again, I find that the Patterson tanks and reels are the easiest to use to avoid the damage,Richard

I do use a Patterson tank. Obviously I'm doing the damage when I load the reel. However, I've been developing 120 roll film for 45 years and have never had this problem until the last 3 or 4 rolls of TMY2. Hence my suspicion that Kodak has changed the film base somehow. Just wondering if anyone else had found it necessary to be extra careful when loading.

 

[Shawn Dougherty]

Just wondering if anyone else had found it necessary to be extra careful when loading.

Yes... I use stainless reels, Hewes, and have simply been SUPER carefull and successfully avoiding them.

My RB67 leaves equal space at either end of the roll but my Rolleiflex T leaves a larger space at the beginning so I load that first as the crescents are always closest to the inside of the reel.

I've also been tucking as little film as possible under the catch and that seems to have helped. I'm one who feels obligated to remove all the tape and have been extra careful doing that as well. Routine for me now so not a big deal but definitely something to think about.

 

[Gerald C Koch]

Photographic emulsions are sensitive to pressure. What you have observed is caused by the film kinking as it was loaded on the reel. This causes a hot spot in the emulsion which develops to a dark cresent. It is a particular problem with thinner films. There is no solution other than to use more care when loading the reel.

 

[2F/2F]

I have seen the problem on others' film in both 35mm and medium format. I have only had it myself on 120 loaded on a bent reel. I fiddled with the film so much getting it onto the junk reel that I put a few dings in the film like the ones you mentioned. I don't think it could have anything to do with which emulsion you are using. I think it occurs during loading, or during unloading and hanging to dry.

 

[c6h6o3]

Photographic emulsions are sensitive to pressure. What you have observed is caused by the film kinking as it was loaded on the reel. This causes a hot spot in the emulsion which develops to a dark cresent. It is a particular problem with thinner films. There is no solution other than to use more care when loading the reel.

I know all that. It's not the issue. The question remains: are the crinkles I've been getting of late caused by Kodak's having changed the physical characteristics of the film base? Since no one else seems to have experienced the phenomenon, the answer is 'probably not'.

 

[c6h6o3]

I guess I'm just getting sloppier as I get older. "Honey, where's my walker and my teeth?"

 

[2F/2F]

"You left your teeth on the walker, dear."

 

[nworth]

Looking at your post carefully, I notice it says, "as it dries." Films usually dry unevenly, and the shape distorts in the process. The real question is whether the distortion remains, or whether any defects in the base are visible, after the film has dried. If not, I wouldn't worry about it.

 

[Gerald C Koch]

I know all that. It's not the issue. The question remains: are the crinkles I've been getting of late caused by Kodak's having changed the physical characteristics of the film base? Since no one else seems to have experienced the phenomenon, the answer is 'probably not'.

Your OP didn't ask whether Kodak had made any changes. Sorry but I can't read minds.

 

[rmolson]

crescent marks

Crescent marks
If your marks are printing dark it is probably the film being overly pressure sensitive. In the 60s Kodak released a new pan lith film for Graphic arts color separation. It was plagued with crescent marks, which printed dark on the color separations We were handling the film with cotton gloves very carefully too.This was not acceptable in a commercial plant at all, Yet the only response, sorry to say, from Kodak was your customer will just have to get use to it!!! We went from an all Kodak shop to an all DuPont shop!

 

[c6h6o3]

"You left your teeth on the walker, dear."

"WHAT?!? I can't hear you. Look to see if my hearing aid is there, too."