Archived posting to the Leica Users Group, 2005/10/18

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Subject: [Leica] OT: mixing different B&W films in the same tank
From: lmc at interlink.es (Luis Miguel Castañeda)
Date: Tue Oct 18 01:47:40 2005
References: <6.1.0.6.2.20051018005823.07ea7b18@192.168.100.42>
 
On 18/10/2005, at 10:00, Richard wrote:

> Quick :-) According to the Digitaltruth dev chart, both Tri X and  
> HP5+ have the same development time using DDX. I happen to have 2  
> rolls of Tri X and 1 roll of HP5+. Would there be any problem  
> putting them all in the same tank?>

that's not a good idea because the antihalation layer of the new  
TriX, which should require a previous water bath that HP-5 does not  
need and Iflord dont recommend. That bath will change the times for  
both films, usually making them a  bit longer, probably the  
Digitaltruth time takes care of it for the TriX and not for the HP5.

I don't know if the antihalation layer reacts with the developer or  
not in case to decide to do not rinse. Anyway the only way to know it  
is trying, but I won't make it  :)
Replies: Reply from dlridings at gmail.com (Daniel Ridings) ([Leica] OT: mixing different B&W films in the same tank)
 In reply to: Message from richard-lists at imagecraft.com (Richard) ([Leica] OT: mixing different B&W films in the same tank)