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GSBN: Digest for 7/2/05

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-> Re: Half lime, half cement plaster mix
     by "Andre de Bouter" forum@...


Date: 2 Jul 2005 03:15:22 -0600
From: "Andre de Bouter" forum@...
Subject: Re: Half lime, half cement plaster mix

Hi everyone,

French literature on lime plaster and limewash says one should only use
pigments (not synth#233#tical) and never more than 200 grams per kg of lime
ratio was giving for limewash)

Sponging pigment on not yet dry (carbonated) lime is a very good idea (and
called Fresco painting; like what Michelangelo did in Rome). The advantage is
indeed a much stronger colour (also it allows an unrivaled deepness of collor)
and its collour is almost eternal (which cannot be said for limewash).

Straw in limeplaster
I advise against using straw (or other fiber) in an outside finsih coat in a
climat where rain can hit the wall during the day and temperature drops below
freezing at night. I believe (from observing our earth-straw plastered walls
and from reading '#160#natural plasters#160##187#) that water can wick into
the plaster
through (or arround) the fibre and the freezing then degrades de plaster as
moisture expands. If fibres are used on an exposed surface I would defenitely
advise hemp rather than straw in combination with lime.

Bale on,



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