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January 2009

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Subject:
From:
Mike Fenner <[log in to unmask]>
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Date:
Wed, 14 Jan 2009 09:21:00 -0000
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My first thought also :) 
If you don't trust your nose or worry about operators becoming addicted to
flux sniffing then:

A simple hydrometer would do it. Water based fluxes will be in the 1.XX
zone, alcohol (IPA) in the 0.8XX.

Probably also just shaking a half filled bottle. Most water based fluxes
will show a nice head, 97% alcohols almost certainly will not.

Regards 

Mike Fenner 
Indium Corporation 



 -----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ian Hanna
Sent: Tuesday, January 13, 2009 11:35 PM
To: [log in to unmask]
Subject: Re: [TN] Water and Alcohol Flux

A bic lighter...

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Larry Dzaugis
Sent: Tuesday, January 13, 2009 6:16 PM
To: [log in to unmask]
Subject: [TN] Water and Alcohol Flux

What is a simple test to tell the difference between alcohol and water
based
fluxes?
Both are 3% solids flux.

I am running both fluxes in the same machine.
The concern is that the wrong flux is loaded during a change over.
They behave so differently that the use of the wrong one will result in
badly soldered boards.

Our long term solution is seperate flux tanks and spray nozzels if it
continues with bar code verified replenishment.

In the mean time what would be a quick test?

The weight of an alchol flux on the PCB is inconsistent due to
evaporation.

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