A Photography forum. PhotoBanter.com

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » PhotoBanter.com forum » General Photography » In The Darkroom
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Substitue KBr for KI in Crawley's FX-1?



 
 
Thread Tools Display Modes
  #1  
Old April 12th 09, 11:59 PM posted to rec.photo.darkroom
Richard Knoppow
external usenet poster
 
Posts: 752
Default Substitue KBr for KI in Crawley's FX-1?


wrote in message
...
Is this a reasonable substitution? If so, how would the
two compare by
weight? (The formulary is out of KI, whereas I have plenty
of KBr.)


Potassium iodide is an anti-foggant but has other
properties, mainly it was used in some older developers to
reduce pressure marks. I don't know why Crawley used it in
his formula. Usually its used in very small amounts. I am
not familiar with what else is in FX-1, my memory of
Crawley's formulae is that they are a bit exotic.
Most film developers have little Kbr in them, perhaps
1 gram/liter of working solution. You will probably have to
experiment.


--
Richard Knoppow
Los Angeles, CA, USA



 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
substitue trays Matt Ashbrook In The Darkroom 22 February 16th 04 06:42 PM


All times are GMT +1. The time now is 10:03 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright 2004-2018 PhotoBanter.com.
The comments are property of their posters.