Adox CHS 100 fixer with keeper

ralle · 2013-08-11T19:16:00+00:00

Hallo, ich habe den Adox CHS 100 ausprobiert. Als Rollfilm finde ich ihn klasse (siehe Beispiel) Mit dem Kleinbildfilm habe ich so meine Probleme. Ich empfi...

ralle

Hello, I’ve tried out the Adox CHS 100. I think it’s brilliant as roll film (see example) I’ve had a few issues with the 35mm film, though. I find the film very thin and fragile. I could barely get it onto the reel (next time I’ll pop it in the fridge for a while so it stiffens up a bit :-) The fully developed film also looks very thin and fragile. In places, it’s picked up a fair bit of dust, even though I don’t usually have any problems with that. € Now for my questions: € - Is it advisable to add a hardener to my Adofix fixer? - Does the film need to be rinsed for longer? I’ve read something about 30 minutes. - Is it OK to put it in the fridge? Here’s another example of my development process. Thank you in advance for your interest. € € €

Olivinyl

Hi Ralle, ? First off, warm regards from Solingen to Wuppertal ;-) ? I’ve never used a hardening bath for this film. The important thing is not to use a stop bath. I rinsed the film afterwards – I think using the Ilford method, just like with any other film. Water into the tank, tilt 3 times, drain water Water into the tank, 6 times... 12 times... 24 times... To be on the safe side, finish with 2 more cycles of 3 times each with fresh water and a 30–60-second wetting bath Please do not strip the film to dry it, but hang it up wet and let it drip dry. After the final wash, ‘bathe’ the film in a wetting agent such as Adox Adoflo or Tetenal Mirasol. To avoid that ‘extra bit’ of dust, it helps a lot to dry the film in the bathroom and keep the window and door closed. After 2 hours at the latest, the film will be dry enough that no more dust can stick to the emulsion. ? I have no problems winding the film onto the Jobo spool with the CHS. ? Best regards, Oliver

ralle

Thanks for your reply. On hot days (30°C+), the negative film was quite 'soft'. Otherwise, I follow roughly the same procedure as you. The instructions regarding the hardener are on the film packaging. I’ll give it a miss. You write: “It’s important not to use a stop bath.” Does that mean you don’t rinse between steps either? ? Best regards from Wuppertal ? Ralle

Olivinyl

Hi Ralle, ? Actually, I do an intermediate rinse with the CHS. Pour out the developer, pour in water, tilt the tank slowly five times, pour out the water, and then add the fixer to the tank. In the worst-case scenario, the acid in the stop bath could damage or dissolve the emulsion on the ADOX CHS. ? I once accidentally stopped a CHS 100 with citric acid (Adostop, STP Classic), but nothing happened. However, I always make the stop bath quite weak. About 2% instead of 3%. ? The CHS 100 is also the only film that isn’t ‘stopped’ with an acid solution. ? With every other film, I still rinse before the stop bath, just as with the CHS, and then add the stop bath to the canister. I use the stop bath until the indicator changes colour. ? Best regards, Oli

jochen53

Hello, A hardening agent added to the fixer – usually alum or formaldehyde – hardens the gelatin in the emulsion, not the support. It is only useful when processing at high temperatures, but in that case you also need to add something to the developer, such as sodium sulphate. As cinema films are subjected to greater mechanical stress during transport, their support has also been hardened.

Olivinyl

Hello, A hardening agent added to the fixer – usually alum or formaldehyde – hardens the gelatin in the emulsion, not the support. It only makes sense when processing at high temperatures, but in that case you also need to add something to the developer, e.g. sodium sulphate. As cinema films are subjected to greater mechanical stress during transport, their support has also been hardened.

€ Hello Jochen, € With the Adox CHS series (old) and the Efke films, the aim is to ‘strengthen’ the emulsion. This has a high speed when wet, although I’ve never had any problems with the emulsion. € The problem with Ralle’s “wobbly” film is probably more down to the 0.1 mm thick PET base on the CHS 100 KB. € Best regards, Oli

ralle

Exactly, the film base is just very thin. I put the film in the fridge before winding it onto the reel. It’s ‘sturdier’ that way. Of course, you shouldn’t wind it onto the reel in a damp bathroom. The temperature difference would cause condensation ;-) € Thanks for your interest, Members and Oli € Regards, Ralle This is what it says on the film packet (inside): [sharedmedia=core:attachments:405]