9b443296   
   From: none@none.com99   
      
   On 1/8/2025 9:00 AM, Clyde wrote:   
   > I have successfully used a light dusting of flour for large scuba   
   > weights and fishing jigs. I don't use it for bullets or anything with   
   > precision tolerances though   
   >   
      
   Graphite spray if you just need a mold release, but typically lead   
   doesn't stick to most common mold alloys anyway.  Tin, pewter, and some   
   other common casting alloys can stick.   
      
   Flour is a new one for me, but it could work as well as talcum powder.   
   The advantage these are used for is not as a mold release, but because   
   the fine particles break up the surface tension of the molten metal and   
   allow it to flow out better.  Talcum powder often works so well that a   
   mold that was experience incomplete pours starts to flash a little if   
   the tolerances aren't good.  I guess flower shouldn't a surprise.  I   
   have had one customer tell me they use corn starch for the same purpose.   
      
   Now, if you mean for soldering applications, I think I would mask, spray   
   with graphite, and then remove masking before carefully applying flux,   
   but that's a little beyond my skill/knowledge set.   
      
   Yes, I am aware this is a twenty year old ZOMBIE THREAD.   
      
   --   
   Bob La Londe   
   CNC Molds N Stuff   
      
   --   
   This email has been checked for viruses by AVG antivirus software.   
   www.avg.com   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)