Archived posting to the Leica Users Group, 2003/01/21
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Andrew Wells wrote: > > What is the difference between the new and old Tri-X formulations people > are talking about...? > > Andrew Wells > San Francisco > > -- All Tri X is divided into three parts: The scratch-resistant coating of hard gelatin to the North (room always for Jello) The backing, a dye coating that prevents light passing through the film from reflecting off the camera's film pressure plate back onto the emulsion; to the South In between, the suspension, who call themselves emulsion. Plus an Adhesive a layer of glue-like gelatin to adhere the emulsion to its base. A strong but flexible cellulose acetate to support all the other layers. I didn't know; there's something French about Tri X! I always thought that. Mark Rabiner Portland, Oregon USA Photography Web Sight: http://www.rabinergroup.com Email: mark@rabinergroup.com - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html