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Re: Rubber toroids




From: 	DamDeName-at-aol-dot-com[SMTP:DamDeName-at-aol-dot-com]
Sent: 	Thursday, October 23, 1997 2:29 PM
To: 	tesla-at-pupman-dot-com
Subject: 	Re: Rubber toroids 

Hi Ed, et al ---

   You are correct --- it is Copper Sulphate (CuSO4-5H2O )
The proportions and conditions :
 
.                Copper Sulphate ------------- 26-33  oz/gal
                 Sulphuric acid     ------------  4-10    oz/gal
Conditions :
                  temp F              ------------ 70-120
           current density (asf)  ------------  20-100
    Agitation ,cathode and/or air    -----  preferred --- ( no air for baby
shoes ) 
    ratio  cathode to anode    -------------  1:1
                      Anodes     ----------------   Copper
  filtration : continuous preferred --- esp. for heavy deposits (as in
electroforming)
                       Voltage ------------------   less than 6 volts
generally 

Source : ---- electroplating engineering handbook ---third edition
hope this helps--
                             Sandy
ps.  copper chloride is , for the most part, insoluble in water.

In a message dated 97-10-21 23:37:33 EDT, you write:
<< Subj:	 Re: Rubber toroids 
 Date:	97-10-21 23:37:33 EDT
 From:	tesla-at-pupman-dot-com (Tesla List)
 To:	tesla-at-pupman-dot-com
 
 ---------- Forwarded message ----------
 Date: Tue, 21 Oct 1997 19:03:14 -0700 (PDT)
 From: "Edward V. Phillips" <ed-at-alumni.caltech.edu>
 To: tesla-at-pupman-dot-com
 Subject: Re: Rubber toroids
 
 "As a 'schoolboy copperplater', we used to use Copper
 Sulphate (CuSo4) - was cheap & readily available.  Is
 Cu chloride preferable, or much of a muchness ?"
 	My plating book doesn't mention the use of copper
 chloride at all.    ???????????
 Ed