Digital BW, The Print

Ernst:

Its not the cost, its the long term effectiveness that is the point.  
The ammonia treatment will/might neutralize existing free acid in 
EAM, but it will not make the paper archival.  As Paul says, it does 
not buffer the paper.  Ammonia is a gas and will evaporate and 
therefore will not be available to neutralize future acids as they 
form.

Jeff Randall

--- In DigitalBlackandWhiteThePrint@y..., "Ernst Dinkla" 
<E.Dinkla@c...> wrote:
> 
> ----- Original Message -----
> From: "Paul Roark" <paul.roark@v...>
> To: <DigitalBlackandWhiteThePrint@y...>
> Sent: Wednesday, October 30, 2002 7:48 PM
> Subject: RE: [Digital BW] EAM Deacidification
> 
> 
> > 15 minutes in a bag/zip lock with ammonia is all that is needed to
> deacidify
> > EAM (meaning the Abbey pH test pen shows good purple - pH higher 
than
> 6.8 -
> > even on interior fibers).  Of course, no buffer is introduced 
with just
> the
> > ammonia treatment.  Bookkeeper spray to the back is probably the 
best we
> can
> > do for buffering future acid production.
> 
> And they can't do that for us at the Epson paper plant ?
> Very cheap process so price can not be the reason.
> 
> Ernst