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Gelatin as as sealer
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actonern
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Joined: 15 Aug 2007
Posts: 444

PostPosted: Fri Mar 28, 2008 8:38 am    Post subject: Reply with quote

Thanks Manfio!
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MANFIO
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Joined: 11 Apr 2007
Posts: 458
Location: Sao Paulo

PostPosted: Fri Mar 28, 2008 8:52 am    Post subject: Reply with quote

I think I have already mentioned my method here, it's the following:

1 - my oil varnish diluted in turpentine, 2 coats;

2 - one coat of "acqua di colla", that is, diluted, thin hide glue with some alum. This thin glue, when cold, will form quite a weak gelatin.

3 - My oil varnish (2 parts oil, one part colophony, one part mastic) in a paste with fine pumice that I rub and burnish into the wood (no residue of the past must be left in the wood surface) , immediatly followed by a thin coat of my oil varnish applied with my fingers.

After that the wood will be completely sealed and I apply 3 coats of highly coloured oil varnish.
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masterbass
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Joined: 09 Oct 2007
Posts: 24

PostPosted: Fri Mar 28, 2008 9:40 am    Post subject: Reply with quote

MANFIO wrote:
"Acqua di colla" is literally "glue water", that is, a very diluted glue. I make it this way:

I warm some water, 100 ml, put some glue (I don't weigt) and some alum (like a pinch of salt, the alum) and let it dissolve and cool a bit (I don't like to apply it hot).

When dry, you will see no glue residue over the wood, it will penetrate entirely in the wood.

Smile
Thanks Manfio!!!
Your knowledge and contributions in the forum are essential to us!!
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