Is this talc used as a lubricant between insulated conductors in
multi-cored cable? Quite often this is French Chalk and not talc, which is
a different mineral.

Pete Duncan



                    Douglas Pauls
                    <[log in to unmask]        To:     [log in to unmask]
                    KWELL.COM>                  cc:     (bcc: DUNCAN Peter/Asst Prin Engr/ST Aero/ST Group)
                    Sent by: TechNet            Subject:     Re: [TN] Talcum powder on wires
                    <[log in to unmask]>


                    06/07/01 08:25 PM
                    Please respond to
                    "TechNet E-Mail
                    Forum."; Please
                    respond to dopauls






Good day, does anyone know of complications or issues that would come about
from talcum powder being present on a wire harness that is hand soldered to
an electronics board?

For instance would the talcum powder affect the solderability of the wires?
Could the talcum powder react with rosin flux?

*Jason, I don't know that you would have a big problem with solderability,
but talcum powder is usually loaded with ionic residue, such as chloride
and sulfate.  I would be concerned that the powder would get on the board
and cause corrosion.   Since talcum powder is largely mineral, it could
react with rosin flux, but I have no idea what the resultant combination
would look like.  Will you be cleaning the board/harness combination?

Doug Pauls
Rockwell Collins

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