Depends.
What is "room temperature"?
What kind of solder paste? Tin/lead, tin/zinc, SAC?
What kind of flux?
What powder size?
How long was it open?
If it was a tin/lead, type 3, R0L0, just opened and then closed right
away, not left in the sun or on a radiator or on top of the reflow oven,
from a reputable solder paste manufacturer, most spec sheets will tell
you 3 to 6 months. Check the spec sheets for your individual solder
paste.
Bev
RIM
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Jose Marroquin
Sent: Friday, January 13, 2006 4:57 PM
To: [log in to unmask]
Subject: [TN] Solder Paste
If solder paste remains in a jar that has been opened, and is re-sealed
and
left at room temperature, how long before is no longer useable?
Thanks.
Jose R. Marroquin
Director of Quality Assurance
RAD Electronics, Inc.
(818) 381-8353
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