I hear that! When I was in the Materials and Processes lab at Singer
Kearfott we had a platers helper (deaf) who was trying to heat up the
concentrated sulfuric acid etch back tank and it got too hot, so he used
a hand pump and was putting it into a 5 gallon non tempered glass
Sparkletts water bottle to cool it. I learned hand signals VERY quickly
and averted a real disaster. Some of the best intentions go
awry.............

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Barmuta, Mike
Sent: Friday, June 03, 2005 8:54 AM
To: [log in to unmask]
Subject: Re: [TN] NTC: electronic jokes

Hi Joe: That reminds me of another PCB shop story. DO NOT TRY THIS AT
HOME!
This was about 20+ years ago. We had a lab tech that we called "Fast
Ronnie"
he was always in a hurry and never followed established procedures very
well.
We were running a sulfuric/peroxide microetch on our electroless Cu
line.
After the mircoetch bath was analyzed Ronnie was supposed to make an add
of
concentrated H2SO4(98%) and concentrated H2O2(50%). Adds were made using
a
polypro 3L graduated cylinder which resembles a small cannon.

Anybody that understands basic chemistry knows not to combine
concentrated
sulfuric acid with a strong oxidizer(conc hydrogen peroxide).
The adds are to be made independently and thorough rinsing of the
graduated
cylinder done before the next chemical is added. Well Fast Ronnie lived
up
to his nickname, he added the sulfuric but was is such a hurry it did
not
completely empty the cylinder. There was still part of the sulfuric left
in
the bottom. He then added the conc peroxide and started to walk over to
the
microetch tank... he never made it. The chemicals combined and the whole
thing went off like the cannon it was. Blew out over a dozen ceiling
tiles,
rained sulfuric peroxide over the tanks and platers. Some of the platers
claimed they saw yellow/tan fireballs shooting across the room like a
fireworks display. The only thing that saved Ronnie was his face shield
and
rubber apron and gloves.
Needless to say we had a fun time with the Fire dept, OSHA and the
insurance
guys. Ronnie thankfully transferred into MLB lamination area.

 
Mike
Barmuta

Fluke Corp.


-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Joe Fjelstad
Sent: Friday, June 03, 2005 6:48 AM
To: [log in to unmask]
Subject: Re: [TN] NTC: electronic jokes


It appears the merry pranksters are alive and well. Of course, none of
this
could or would be done today without fear of serious legal reprisals and
lots
of money for pain and suffering (with the lawyer getting 50% or any
proceeds).

It reminded me, however, of a more harmless event some 30 plus years
ago. I
came in early (about 3AM) on 3rd shift at a PCB shop I was working at
one
winter day to run analysis on some copper plating baths that were being
carbon
treated. I wander out to the plating area to find 3 of the platers
sitting
in a
400 gallon plating tank (post rinsing) and refilled with RO water which
had
been
heated to a comfortable temperature. It was pretty comical sight.

Needless to say they were told clean the tank again after the major
"bits"
of
"organic contamination" were removed and not to repeat the activity.

Cheers,
Joe

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask]
or
847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------