From: jjhudak@gmail.com   
      
   On Wednesday, August 2, 2023 at 2:53:00 PM UTC-4, Peter W. wrote:   
   > Contact cleaners - a moving target.    
   >    
   > When my wife and I were working in Saudi Arabia, I purchased Cramolin Red in   
   the electronics souks for SR10 (about US$3) per 300ml pressurized can. In   
   Saudi, nothing can be sold without complete disclosure on the labels (Caig   
   products are not sold    
   there). So each can had on it: Hydrocarbon and hydrocarbon propellants: 95%.   
   Oleic Acid: 5%.    
   >    
   > Oleic Acid has been used in the clockmakers profession for over 100 years.    
   > Oleic Acid is a derivative of cheap olive oil, for the most part, and can be   
   purchased in food-grade quality (purest) over the counter, and sent through   
   the mails.    
   > I mix it in 1/2 ounce quantities in eyedropper bottles using pure naptha as   
   the medium at slightly less than 5%.    
   > Why? Contact cleaners such as DeOxit have the virtue (vice) of continuing to   
   react until all the active ingredients have been consumed. So, it MUST be   
   rinsed off after the work is done to prevent further reaction.    
   >    
   > As proof-of-concept, find an old actually-copper penny and put it in very   
   cheap olive-oil for a bit.    
   >    
   > Once upon a time, Caig was the US distributor of Cramolin products - that   
   ended very badly with considerable ugliness on both sides. To this day, I will   
   not purchase Caig products.    
   >    
   > Peter Wieck    
   > Melrose Park, PA   
      
   Interesting - never heard of Oleic acid.  So what are the percentages of oleic   
   acid to naptha.   
   So you are saying that the oleic mixture does not have to be rinsed off?  And   
   it functions well as a contact cleaner?   
   Thanks   
   J   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)