We use a Brady Label with Thermal Transfer Printer (300X-Plus) and have had
pretty good success.   Our cleaning process includes Aqueous/w sophonifier
and a few different chemical cleaners (alcohol, vaporedge 1000 etc.) and we
manage to keep our labels intact and readable.

M Mallory
L-3 Comm./West

> -----Original Message-----
> From: Madhavi Dhawan [SMTP:[log in to unmask]]
> Sent: Monday, July 03, 2000 1:04 PM
> To:   [log in to unmask]
> Subject:      [TN] Permanent Marker for ID # marking on PCB while being
> build
>
> In a typical flowline assembly of circuit boards, what are the different
> methods used for tracking WIP ?
>
> I can think of :
>
> 1. travel cards - not suitable for panelised boards
> 2. Marking ID# on board at various operations while board is being built.
> that communicates next operation - completion of previous screening
> operation and who did it
> 3. Apply labels - cost could be issue as more you add info, higher the
> cose
> will be
>
> Though method at sr no 2 is flexible and cost effective but has limitation
> that the marking may inadvertently removed due to handling or spot
> cleaning
> during processing or rework / repair.
>
> I am looking for a Marker Pen which has ink suitable for PCB marking and
> it
> does not dissolve into alcohol readily. Any suggestion on Marker or
> alternate method will be highly appreciated.
>
> The soldering process is NC. Spot cleaning is unavoidable. smearing of ink
> "
> sharpie pen" inadvertently is again unavoidable. We are looking for Marker
> Ink which can bear the handling / such situation.
>
> For Canadians, belated Canada Day and for American, wish you America Day .
>
>
> Ashok Dhawan
>
>
> ________________________________________________________________________
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