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Re: [BKARTS] matching old paper



what about a source for old papers? There must be a
way to obtain antique papers?
--- Peter Krantz <restore@xxxxxxxxxxxxxxxxxxx> wrote:
> Greetings,
>
> Many years ago, we were advised that a particular
> make of English gravy browning
> gave a good ageing colour to paper.  We tried it,
> and it works well, to this
> day.  It gives a reading of about 8 on the pH meter.
>  In the alkaline range.
>
> The active ingredient is Caramel colouring E150,
> which is made from burnt sugar.
> This is the basis of the brown colouring in
> Coca-Cola, as well as all the pies
> and gravies around(as our food colouring supplier
> here in Sydney has just
> informed us).  Be aware, though, that the E150 range
> of Caramel colourings as
> supplied to the industry, has a pH below 7, i.e. in
> the acidic range, so if you
> wish to obtain supplies yourself of the basic
> caramel colouring, you will have
> to buffer any solutions yourself.
>
> The gravy browning colouring we use is alkaline, as
> indicated above.  Would this
> property indicate its suitability for use in
> archival/conservation practice?
> Perhaps the learned members of this List might wish
> to comment.
>
> Yours...
>
>
> Peter Krantz.
>
> ************************************************
> Book Restorations.
> 34 Clanville Road,
> Roseville,
> N.S.W.        2069,
> Australia.
>
> (P.O. Box 500,  North Sydney,  N.S.W.  2059.)
>
> Telephone:  +61 2 9416.9900
> Fax:  +61 2 9416.6800
> Email:  restore@xxxxxxxxxxxxxxxxxxx
>
> Established:  1976
>
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     *Postings may not be re-printed in any form without the express
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