Kaolin sounds likely. Toothbrush to get the fine stuff out and if caustic soda helps, use it.
Donald.
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----- Original Message -----
> From: "Kerry Koppert" <kkoppert@...>
> To: "Homebrew PCBs" <Homebrew_PCBs@yahoogroups.com>
> Sent: Friday, August 2, 2013 6:40:17 PM
> Subject: Re: [Homebrew_PCBs] Glossy coating removal
> On 2/08/2013 11:55 p.m., Donald H Locker wrote:
> >
> > What is the paper? Do you know what the residue is?
> >
>
> I don't know if the brand is available outside New Zealand, but it is
> "fresh∗paper" brand OCCASIONS Photo & Presentation paper. 180 gsm
> glossy
> paper, glossy on one side ffairly rough on the other, made in China. I
> haven't had access to a mass spectrometer for several years so I don't
> know what the coating is, I just assumed it was Kaolin. There is a
> website listed http://www.freshprintcompany.com but I can't connect to
> it.
>
> >
> > Donald.
> > --
> > ∗Plain Text∗ email -- it's an accessibility issue
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> >
> > ----- Original Message -----
> > > From: "Kerry Koppert" <kkoppert@...
> > <mailto:kkoppert%40xtra.co.nz>>
> > > To: "Homebrew PCBs" <Homebrew_PCBs@yahoogroups.com
> > <mailto:Homebrew_PCBs%40yahoogroups.com>>
> > > Sent: Friday, August 2, 2013 5:42:06 AM
> > > Subject: [Homebrew_PCBs] Glossy coating removal
> > >
> > > I've finally found a paper that works with the laser transfer
> > > method.
> > > Only problem, it leaves a fine residue behind on an between the
> > > pads of
> > > smaller smd i.e, ssop pic processors. Is anyone aware of a
> > > chemical
> > > agent which will loosen this coating without lifting the laser
> > > transfer?
> > > I'm trying dilute caustic soda which looks promising.
> > >
> >
> >
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
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