developing tank roll film

filmmaster · 12-23-2021, 11:28 PM

heres teh thing, been using an AP compact from freestyle for two years, and its just getting worse in the leakage department. At first it was just the red lid leaking, now its the screw theads leaking.

who is making a tank for film on a reel, that has a reliable sealing lid, that doesnt use more then one hole for drainage

**jbinpg** · 12-24-2021, 12:24 AM

My AP tank leaks as well but I stop it by using a layer of plastic wrap beneath the red lid. My threads have not started leaking.

**fs999** · 12-24-2021, 01:10 AM

Since the beginning in the 70s the Jobo tanks. They all leak (I tried AP and Paterson) but the Jobo 1500 less.

StiffLegged · 12-24-2021, 03:57 AM

Get a stainless steel tank!

**ProfessorBuzz** · 12-24-2021, 06:12 AM

None of my Paterson tanks leak; but you could always go with a stainless tank.

kypfer · 12-24-2021, 08:45 AM

I don't remember my Paterson or my Jobo tanks leaking badly, but using inversion processing could cause a little bit of "blowby" from around the polythene lid.
On the Paterson I rectified the problem with a pin-hole in the lid.
Seal the hole with a fingertip when inverted, release to vent when back upright.
I only usually used the Jobo tanks in the machine, (can't remember what it was called), so any if there was any leakage, it dissipated in the water bath.

**Bob 256** · 12-24-2021, 12:21 PM

I've seen some "leak proof" tanks but can't remember where. I think those were a combination of SS and plastic. I even have the issue with my Nikor SS tanks. The main lid fits tight enough but the filler lid does not and the little bit of pressure developed inside the tank during development will push a bit of solution past the seal upon inversion. Probably a tank which relies on O rings might be liquid tight but nowadays you could be hard pressed to find one. Are you into 3D printing? Some designs exist there which might be an improvement in your case.

https://www.thingiverse.com/thing:3726422

https://www.thingiverse.com/thing:4631846

Last edited by Bob 256; 12-24-2021 at 12:33 PM.

filmmaster · 12-24-2021, 01:44 PM

dont 3d print.

Pentaxrookie · 01-11-2022, 09:50 AM

As far as I know the AP tanks leak a tiny bit which is considered normal. That's why they are so cheap.
I am using the Paterson one and no leaking here. Not a single drop.
For my 4x5 films I am using the Stearmanpress tank which also is completely tight.
Always make sure to pre wet o-ring (if there are any) with water or better salvia prior closing so it doesn't roll aside.

ChrisPlatt · 01-27-2022, 06:01 PM

Originally posted by Pentaxrookie

As far as I know the AP tanks leak a tiny bit which is considered normal. That's why they are so cheap.
I am using the Paterson one and no leaking here. Not a single drop.

My experience has been the exact opposite.
My Paterson System 4 tanks have all leaked a bit.
My AP Compact developing tanks don't spill a drop.

Chris

Pentaxrookie · 01-28-2022, 09:30 PM

Originally posted by ChrisPlatt

My experience has been the exact opposite.
My Paterson System 4 tanks have all leaked a bit.
My AP Compact developing tanks don't spill a drop.

Chris

Ah, interesting. Thanks for sharing.

**Bob 256** · 01-29-2022, 01:03 PM

Here's one if the type that says it doesn't leak and the price is reasonable.

https://www.adorama.com/dkt235.html?adlclid=8976fa228bcc132f29929...e=adl-umbase-p

**jbinpg** · 01-29-2022, 11:56 PM

Since this thread opened, I have been searching for a better way to stop my AP Compact from leaking. Before starting inversions, I press down on the top of the red lid with the the heel of my hand as if it were a piece of tupperware. This creates a negative pressure inside the tank which helps prevent the leaking.

ChrisPlatt · 01-30-2022, 07:12 AM

Originally posted by jbinpg

Since this thread opened, I have been searching for a better way to stop my AP Compact from leaking. Before starting inversions, I press down on the top of the red lid with the the heel of my hand as if it were a piece of tupperware. This creates a negative pressure inside the tank which helps prevent the leaking.

Yes, "burping" the lid is essential.

Chris

Pentaxrookie · 01-30-2022, 11:35 PM

Originally posted by jbinpg

Since this thread opened, I have been searching for a better way to stop my AP Compact from leaking. Before starting inversions, I press down on the top of the red lid with the the heel of my hand as if it were a piece of tupperware. This creates a negative pressure inside the tank which helps prevent the leaking.

I do the same with the Paterson tank and in a similar way with the Stearman Press tank. So it seems this is the solution to all leaking.

12-23-2021, 11:28 PM	#1
filmmaster Banned Join Date: Nov 2021 Posts: 141	developing tank roll film heres teh thing, been using an AP compact from freestyle for two years, and its just getting worse in the leakage department. At first it was just the red lid leaking, now its the screw theads leaking. who is making a tank for film on a reel, that has a reliable sealing lid, that doesnt use more then one hole for drainage

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Paterson / AP / Jobo universal developing tank - solution quantities?	BigMackCam	Film Processing, Scanning, and Darkroom	22	01-21-2022 10:47 AM
For Sale - Sold: Patterson Super System 4 developing tank 35mm 120 film, w/box and manual	17dew	Sold Items	3	08-17-2020 06:11 AM
A funny thing happened in the developing tank today.	pathdoc	Film Processing, Scanning, and Darkroom	12	07-12-2019 12:23 AM
Tank Developing vs. Film Curl	Hello_Photo	Film Processing, Scanning, and Darkroom	8	06-21-2012 04:29 AM
Does this developing tank look to be complete?	Steinback	Film Processing, Scanning, and Darkroom	12	07-19-2010 06:51 AM

12-24-2021, 12:24 AM	#2
jbinpg Site Supporter Join Date: Mar 2008 Location: Prince George, BC Photos: Gallery \| Albums Posts: 3,472	My AP tank leaks as well but I stop it by using a layer of plastic wrap beneath the red lid. My threads have not started leaking.

12-24-2021, 01:10 AM	#3
fs999 Loyal Site Supporter Join Date: Jul 2008 Location: Luxembourg Photos: Gallery Posts: 7,633	Since the beginning in the 70s the Jobo tanks. They all leak (I tried AP and Paterson) but the Jobo 1500 less.

12-24-2021, 03:57 AM	#4
StiffLegged Pentaxian Join Date: Jan 2018 Photos: Gallery Posts: 3,507	Get a stainless steel tank!

12-24-2021, 06:12 AM	#5
ProfessorBuzz Loyal Site Supporter Join Date: Feb 2018 Posts: 1,670	None of my Paterson tanks leak; but you could always go with a stainless tank.

12-24-2021, 08:45 AM	#6
kypfer Pentaxian Join Date: Jan 2018 Location: Jersey C.I. Posts: 2,539	I don't remember my Paterson or my Jobo tanks leaking badly, but using inversion processing could cause a little bit of "blowby" from around the polythene lid. On the Paterson I rectified the problem with a pin-hole in the lid. Seal the hole with a fingertip when inverted, release to vent when back upright. I only usually used the Jobo tanks in the machine, (can't remember what it was called), so any if there was any leakage, it dissipated in the water bath.

12-24-2021, 12:21 PM	#7
Bob 256 Site Supporter Join Date: Jun 2008 Location: Idaho Photos: Gallery Posts: 1,942	I've seen some "leak proof" tanks but can't remember where. I think those were a combination of SS and plastic. I even have the issue with my Nikor SS tanks. The main lid fits tight enough but the filler lid does not and the little bit of pressure developed inside the tank during development will push a bit of solution past the seal upon inversion. Probably a tank which relies on O rings might be liquid tight but nowadays you could be hard pressed to find one. Are you into 3D printing? Some designs exist there which might be an improvement in your case. https://www.thingiverse.com/thing:3726422 https://www.thingiverse.com/thing:4631846 Last edited by Bob 256; 12-24-2021 at 12:33 PM.

12-24-2021, 01:44 PM	#8
filmmaster Banned Join Date: Nov 2021 Posts: 141 Original Poster	dont 3d print.

01-11-2022, 09:50 AM	#9
Pentaxrookie Senior Member Join Date: Feb 2018 Location: 48282 Emsdetten Posts: 113	As far as I know the AP tanks leak a tiny bit which is considered normal. That's why they are so cheap. I am using the Paterson one and no leaking here. Not a single drop. For my 4x5 films I am using the Stearmanpress tank which also is completely tight. Always make sure to pre wet o-ring (if there are any) with water or better salvia prior closing so it doesn't roll aside.

01-27-2022, 06:01 PM	#10
ChrisPlatt Pentaxian Join Date: Nov 2007 Location: Rockaway Beach NYC Posts: 7,358	Originally posted by Pentaxrookie As far as I know the AP tanks leak a tiny bit which is considered normal. That's why they are so cheap. I am using the Paterson one and no leaking here. Not a single drop. My experience has been the exact opposite. My Paterson System 4 tanks have all leaked a bit. My AP Compact developing tanks don't spill a drop. Chris

01-28-2022, 09:30 PM	#11
Pentaxrookie Senior Member Join Date: Feb 2018 Location: 48282 Emsdetten Posts: 113	Originally posted by ChrisPlatt My experience has been the exact opposite. My Paterson System 4 tanks have all leaked a bit. My AP Compact developing tanks don't spill a drop. Chris Ah, interesting. Thanks for sharing.

Thread Tools	Search this Thread
	Search this Thread: Advanced Search

01-29-2022, 01:03 PM	#12
Bob 256 Site Supporter Join Date: Jun 2008 Location: Idaho Photos: Gallery Posts: 1,942	Here's one if the type that says it doesn't leak and the price is reasonable. https://www.adorama.com/dkt235.html?adlclid=8976fa228bcc132f29929...e=adl-umbase-p

01-29-2022, 11:56 PM	#13
jbinpg Site Supporter Join Date: Mar 2008 Location: Prince George, BC Photos: Gallery \| Albums Posts: 3,472	Since this thread opened, I have been searching for a better way to stop my AP Compact from leaking. Before starting inversions, I press down on the top of the red lid with the the heel of my hand as if it were a piece of tupperware. This creates a negative pressure inside the tank which helps prevent the leaking.

01-30-2022, 07:12 AM	#14
ChrisPlatt Pentaxian Join Date: Nov 2007 Location: Rockaway Beach NYC Posts: 7,358	Originally posted by jbinpg Since this thread opened, I have been searching for a better way to stop my AP Compact from leaking. Before starting inversions, I press down on the top of the red lid with the the heel of my hand as if it were a piece of tupperware. This creates a negative pressure inside the tank which helps prevent the leaking. Yes, "burping" the lid is essential. Chris

01-30-2022, 11:35 PM	#15
Pentaxrookie Senior Member Join Date: Feb 2018 Location: 48282 Emsdetten Posts: 113	Originally posted by jbinpg Since this thread opened, I have been searching for a better way to stop my AP Compact from leaking. Before starting inversions, I press down on the top of the red lid with the the heel of my hand as if it were a piece of tupperware. This creates a negative pressure inside the tank which helps prevent the leaking. I do the same with the Paterson tank and in a similar way with the Stearman Press tank. So it seems this is the solution to all leaking.