 
| X400-Content-Type: |
P2-1988 ( 22 ) |
| Old-Return-Path: |
|
| Date: |
02 Aug 96 09:09:16 -0500 |
| Precedence: |
list |
| Resent-From: |
|
| Conversion: |
Allowed |
| Disclose-Recipients: |
Prohibited |
| From [log in to unmask] Sun Aug 4 14: |
24:28 1996 |
| X-Status: |
|
| Status: |
O |
| Priority: |
non-urgent |
| X-Loop: |
|
| Content-Return: |
Allowed |
| X-Mailing-List: |
|
| TO: |
|
| Received: |
by ipc.org (Smail3.1.28.1 #2)
id m0umLaq-0000Q8C; Fri, 2 Aug 96 09:52 CDT |
| Return-Path: |
<TechNet-request> |
| X400-Originator: |
|
| X400-Recipients: |
non-disclosure; |
| Alternate-Recipient: |
Allowed |
| Message-Id: |
<00E6832020C0C01F*/c=us/admd=cwmail/prmd=carrier/o=syracuse/ou=ccmail1/s=Parr/g=Aric/@MHS> |
| Resent-Message-ID: |
<"e9hU3.0.x0A._OX0o"@ipc> |
| Subject: |
|
| From: |
|
| Resent-Sender: |
|
| X400-Received: |
by /c=us/admd=cwmail/; Relayed; 02 Aug 96 09:09:16 -0500
by mta MTAwltk in /c=us/admd=cwmail/; Relayed;
02 Aug 96 09:09:16 -0500 |
| Content-Identifier: |
00E6832020C0C01F |
| X400-Mts-Identifier: |
[/c=us/admd=cwmail/; 00E6832020C0C01F-MTAwltk] |
| Parts/Attachments: |
|
|
You can dunk it in sulfuric acid and touch the chrome with a bar of
zinc metal or add thiourea to etch the chrome.
Aric Parr
United Technologies Electronic Controls
______________________________ Reply Separator _________________________________
Subject: Re: FAB: to etch chrome but not copper
Author: [log in to unmask] at internet
Date: 8/1/96 7:59 PM
RE: Etching chrome. As an unspecific recollection, I believe that a
KOH + Potassium Permanganate solution will strip Chrome from Copper.
I am not certain of concentrations and temperatures. Note that this
will create environmental concerns on the spent etch solution and
rinses.
Marshall Gurian
Coates ASI
______________________________ Reply Separator _________________________________
Subject: FAB: to etch chrome but not copper
Author: [log in to unmask] at internet
Date: 8/1/96 11:52 AM
Can anyone tell me what etchant will dissolve chrome but not copper?
I'm thinking about using cold dilute sulfuric acid but I'm not sure what is
used commercially anymore.
Thanks!
***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To unsubscribe from this list at any time, send a message to: *
* [log in to unmask] with <subject: unsubscribe> and no text. *
***************************************************************************
***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To unsubscribe from this list at any time, send a message to: *
* [log in to unmask] with <subject: unsubscribe> and no text. *
***************************************************************************
***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To unsubscribe from this list at any time, send a message to: *
* [log in to unmask] with <subject: unsubscribe> and no text. *
***************************************************************************
|
|
|
