Superia 100 and T-Max 100 are both 0,14 mm thick. That makes the volume of a 36 exposure film = 3,64 cc. My estimate of 1 ml being left in the film is an over estimate, since the emulsion is very much thinner than the base. I don't think the emulsion could absorb more than it's own volume of solution at 20-38 C. Next time I process I'll weigh the film wet and see just how much weight it loses in drying. The amount of solution remaining on the reel and in the tank (not in the emulsion) is irrelevant because this is diluted and removed as soon as the water is changed.
Don _______________ Dr E D F Williams http://personal.inet.fi/cool/don.williams Author's Web Site and Photo Gallery See Extra Pages 'The Cement Company from HELL!' Updated: August 15, 2003 ----- Original Message ----- From: "mike wilson" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, March 30, 2004 10:26 PM Subject: Re: Recommendations: Roll Film Washer > Hi, > > William Robb wrote: > > > For the sake of discussion, I am going to presume that all the > > retained solution is in the film, ignoring that some of the retained > > solution is actually on the reel and tank walls. I will also round my > > figures off where it suits me. > > I calculated somew time ago that a 36 exposure roll of film on the > > reel when saturated held some 30ml of solution. > > That seems like a very high figure to me. As a very rough calculation, > I make the total volume of a film to be (100x2.6x0.05)=13cc. It is > probably thinner than 0.05cm (1/2 a millimetre) but definitely no thicker. > > Do you mean the volume encompassed by the spiral of the film? > > mike >
