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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