Thanks, Frederick. Technet, take note. Here is a possible supplier where you can buy smaller quantities of paste so you don't have to buy too much on a minimum buy.
-----Original Message-----
From: Frederick Miller [mailto:[log in to unmask]]
Sent: Tuesday, January 17, 2012 5:55 AM
To: Stadem, Richard D.
Subject: RE: [TN] Expired Solder Paste
Thanks Richard. I checked Stanley Supply and they have the paste in the
small tubes.
Best regards
Frederick H. Miller, P.E.
Astrolab, Inc.
4 Powder Horn Drive
Warren, NJ 07059
Tel: 732-560-3800
Fax: 732-560-9570
www.astrolab.com
[log in to unmask]
-----Original Message-----
From: Stadem, Richard D. [mailto:[log in to unmask]]
Sent: Monday, January 16, 2012 4:11 PM
To: Frederick Miller
Subject: RE: [TN] Expired Solder Paste
I don't know. Ask the following:
Stanley Supply
Hisco
Your Kester rep or other solder paste rep.
-----Original Message-----
From: Frederick Miller [mailto:[log in to unmask]]
Sent: Monday, January 16, 2012 2:18 PM
To: Stadem, Richard D.
Subject: RE: [TN] Expired Solder Paste
Richard,
I have the same problem. We only use a very small amount of paste for
connector assembly. We have to pay to have the extra taken away. Who can
sell me the smaller amounts?
Regards
Frederick H. Miller, P.E.
Astrolab, Inc.
4 Powder Horn Drive
Warren, NJ 07059
Tel: 732-560-3800
Fax: 732-560-9570
www.astrolab.com
[log in to unmask]
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
Sent: Monday, January 16, 2012 2:43 PM
To: [log in to unmask]
Subject: Re: [TN] Expired Solder Paste
Not always possible, Reuven.
The issue is that most solder paste distributors will not accept orders
for small quantities of solder paste. There is usually a minimum buy of
about 20 of the 500-600 CC cartridges or jars. Therefore many smaller
companies have to find distributors who will sell them smaller
quantities, or they need to re-certify their paste for a longer shelf
life.
However, I recently found out that some distributors may provide paste
in smaller quantites if it is purchased in smaller 50 or 100 cc
syringes, which might work for some folks.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Reuven Rokah
Sent: Monday, January 16, 2012 1:24 PM
To: [log in to unmask]
Subject: Re: [TN] Expired Solder Paste
You should plan your solder paste consumption / purchasing according the
shelf life of the SP and store it according the manufacturer instruction
and manage it in FIFO priority.
If you are talking on years after expiration date, you have a big
logistic
and process problems.
Reuven
On Mon, Jan 16, 2012 at 8:37 PM, Matthias Mansfeld <
[log in to unmask]> wrote:
> On 16 Jan 2012 at 8:17, Stadem, Richard D. wrote:
>
> > You can re-certify expired solder paste per J-STD-005 section 6.0.
> > Used the form attached therein, and follow the appropriate test
> > methods (also listed at the end of J-STD-005, #2.4.34, 2.4.34.1,
> > 2.4.34.2, 2.4.34.3 for the viscometer you wish to use. You should
> > always perform first article testing, monitor your PPMO, etc., and
> > document all product run with the re-certified paste.
>
> For what it's worth, a good solder paste, stored under good
> conditions may work well even years after expiration. Been there,
> done that without re-certification (don't worry, no customer
> projects, just some own DIY-stuff....). For this stuff I use still
> the same 1kg-jar with old Sn63Pb Alpha RMA390D3K from 2003.... prints
> well, tacky like new, and visually perfect, shiny solder joints...
> even 8 years after expiration date.
>
> Best regards
> Matthias Mansfeld
> --
> Matthias Mansfeld Elektronik * Leiterplattenlayout
> Neithardtstr. 3, 85540 Haar; Tel.: 089/4620 093-7, Fax: -8
> Internet: http://www.mansfeld-elektronik.de
> GPG http://www.mansfeld-elektronik.de/gnupgkey/mansfeld.asc
>
>
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