The best course of action would be to return to supplier.
Next best is to get them to requalify material.
Last best is you test coalescence. Ie print and reflow a blob on a non
wetting surface such as alumina. When evaluating result think Solar system.
You are looking for just the Sun, IF you get a planet as well it's an hmmm
situation, Asteroid belt is a no no. This is documented in IPC - over
several paras of course.
Probably a spread test is a good idea too. Also documented.
Of course the shelf life has been shot to pieces so you will need to do this
each time you issue the stuff to line.
-- 
Regards 
 
Mike Fenner 
BS&P
M: +44 [0] 7810 526 317 
T: +44 [0] 1865 522 663

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Lawrence Dzaugis
Sent: Saturday, June 06, 2015 2:10 AM
To: [log in to unmask]
Subject: Re: [TN] Solder Paste Question

Shelf life greatly reduced. How long do you allow this paste to be out of
the refrigerator?

Leland Woodall <[log in to unmask]> wrote:
>Everyone,
>
>We just received 25 tubes of solder paste that got misplaced by the carrier
and was delivered in 6 days instead of the usual two.  When it arrived it
was warm to the touch.
>
>We performed a viscosity test after allowing it to stabilize to ambient,
and the readings returned were within spec and very close to our typical
results.
>
>Is there any danger in using this shipment?
>
>Thanks for your help!
>
>Leland
>
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