Digital BW, The Print

On Oct 28, 2008, at 10:04 AM, dgattarino wrote:

> Dear all,
>
>   we finally have come to a conclusion of our R&D program on B&W fine
> art printing. We are finally satisfied with the results we got after
> 1.5 years of tests. The most difficult part was to achieve at the same
> time good Dmax, nice looking prints and archival standard on fine art
> printmaking paper. The technique we come up with, Carbon-Gelatine
> printing, is described in details on our new website:
> http://www.mantinieri.com/techniques.html [snip]

> Gelatin based coating is commonly used in art work restoration as  
> it is easily removed from the substrate without ruining the  
> underlying art. In fact, immersing the print in a water bath at 40 ° 
> C is sufficient to liquefy the gelatine and fully removing it from  
> the paper without any mechanical intervention. After the  
> restoration, a new coating is easily reapplied whenever necessary.  
> [quoted from the web site]
What changes in the coating might make re-coating necessary, Daniela?  
And at approximately what intervals would changes in the coating be  
expected to make re-coating routinely necessary? I'm wondering about  
the case for gelatine coating vs. no coating. Or perhaps some other  
coating, not that I have one to recommend; I hope to avoid coating.

Thanks.
--
Sam