Lainie,

Unless I am mistaken, Kester 1189 is or was, Hughes HF1189 which was
essentially a mix of citric acid (lemon juice) and water.

The "baked on flux" may be severe corrosion even an etched surface?

Surely someone at Kester can advise you? Perhaps Bob Clarke who was at Hughes
Tucson, is a TechNetter and could advise?

It would seem that you are trying to clean up your wave solder machine so
doesn't the supplier have an answer?

My only suggestion, without knowing the thickness of the flux deposit, would
be to try a "Stripping solvent" such as HumiSeal 1076 or even 1063. Call Bill
Lott at HumiSeal: (718) 932 0800

Graham Naisbitt


Concoat Ltd                                     Email: [log in to unmask]
Alasan House, Albany Park                       Tel:    +44 (0)1276 691100
Camberley, Surrey GU15 2PL UK           Fax:    +44 (0)1276 691227


-----Original Message-----
From:   TechNet Mail Forum  On Behalf Of Lainie Loveless
Sent:   Tuesday, August 12, 1997 4:40 PM
To:     [log in to unmask]
Subject:        [TECHNET] Cleaning Baked Flux

Hi All ---
Does anyone know of an effective way to remove baked on flux in
general and in particular from pre-heaters (bulbs).  Alcohol is not
working very well and scraping is slow and tedious.

Thanks!

P.S.  The flux is aqueous (Kester 1189).
Lainie Loveless
General Atronics Corp
Wyndmoor, PA
(215) 242-7336