Ivan

If my memory serves me correctly, 3355 contains some 30-odd percent solids, the active
component of which is glutamic acid hydrochloride. If this precipitated out, you would
be left with a lower concentration in the solvent mixture, probably isopropanol and
water plus the vehicle (which can vary according to the subscript), and this would
certainly lower the SG. I'd guess that if you took the drum into a warm environment
again, the precipitate would slowly redissolve, but you would need to homogenise the
solution a couple of times.

However, I concur that fluxes should never be stored in cold or hot conditions.

Brian

Ivan Barrios wrote:

> Recently, the flux we are currently using (Lonco Organo-Flux 3355 Highly active
> halide containing water soluble flux) had very low readings on density.  (0.845
> @ 13C).  It was stored in an outside chemical room, roof covered but the door is
> chai link fence and about 10 ft wide. The temperature got down to +20 F
> overnight, and I am wondering if it would be possible to have the flux and the
> thinner separate at this low temperature, with the thinner floating to the top
> of the container and the flux depositing in the bottom of the barrel.
> Are there any special guidelines I should follow for storage of the flux? (Any
> type, not just this specific one)
> As  continued to use this flux, the readings have gone back to normal, and never
> saw any soldering issues related to flux problems. Any and all answers
> appreciated.
> Ivan Barrios
>
> ##############################################################
> TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
> ##############################################################
> To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
> the body:
> To subscribe:   SUBSCRIBE TECHNET <your full name>
> To unsubscribe:   SIGNOFF TECHNET
> ##############################################################
> Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
> information.
> If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
> 847-509-9700 ext.5365
> ##############################################################



--
Brian Ellis
Protonique SA
PO Box 78
CH-1032 Romanel-sur-Lausanne, Switzerland
Voice: +41 21-648 23 34 Fax: +41 21-648 24 11
E-mail: [log in to unmask]
URL: Technical and consultancy divisions:
       http://www.protonique.com
     Web services division:
       http://www.protonique.com/webserv

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################