Cob: organic materials for earthen plaster ???

Wed Aug 28 07:09:44 CDT 2002

Interesting...I don't know what happens when you 
use organic matter in the plaster mix, but something to note is that the items 
you are referring to are all primarily protein(which I think is impt. as 
proteins break down slowly).  As with any chemical brew, each ingredient 
has specific properites that change the mix.

I've studied a bit of art history and done a 
little research into making my own paints.  I have recipies for water 
colors and tempras that organic ingredients such as:

egg 

ox gall

gum(eg. gum arabic)

gycerine

Gum arabic and egg are both used as carriers for 
the pigment or sovlents.

Ox gall(not to be confused with blood) is used to 
break water surface tension and makes water colors "flow" better.

Gycerine is used to retard drying--both tempra 
and watercolor are know for fast drying speed.

I know nothing of Ox blood--couldn't find it in 
my book.  I know that tempra has great longevity--there are egg tempras 
which are pretty and vibrant after 100s of years.  Oil darkens with 
age.  As for the decay rate of the organics, don't know.  Keeping dry 
is better for works of art...so...may not be advisable to use some additives in 
places that are moist.

On another note, Bioshield makes a new clay 
paint(no VOCs) that's worth checking out:

http://www.bioshieldpaint.com/ 

----- Original Message ----- 

From: Charmaine R Taylor  

To: dello.mo at libero.it 
Cc: coblist at deatech.com 

Sent: 8/27/02 12:05:15 PM 

Subject: Re: Cob: organic materials for 
earthen plaster ???

hI Mohamed- Why don't you explain the " Horasan "  recipe you 
mention?

We would like to know what the materials are.

I have not heard of egg  white in clay, but of egg Yolk to make 
a

tempura paint wtih lime.

OX BLOOD IS USED AS A HARDENER AND WATERPROOFER IN CLAY/COB, AND 
PEOPLE

ALL OVER THE WORLD HAVE USED WHAT THEY HAVE...MUCH OF THIS 
INFORMAITON

IS LOST.

opps..caps lock...

Ms. Charmaine  Taylor/ Taylor Publishing

http://www.dirtcheapbuilder.com 

http://www.papercrete.com 

PO Box 375, Cutten (Eureka) CA 95534

707-441-1632

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<DIV><FONT face=Verdana size=2>Interesting...I don't know what happens when you use organic matter in the plaster mix, but something to note is that the items you are referring to are all primarily protein(which I think is impt. as proteins break down slowly).  As with any chemical brew, each ingredient has specific properites that change the mix.</FONT></DIV>
<DIV><FONT face=Verdana size=2>I've studied a bit of art history and done a little research into making my own paints.  I have recipies for water colors and tempras that organic ingredients such as:</FONT></DIV>
<DIV><FONT face=Verdana size=2>egg </FONT></DIV>
<DIV><FONT face=Verdana size=2>ox gall</FONT></DIV>
<DIV><FONT face=Verdana size=2>gum(eg. gum arabic)</FONT></DIV>
<DIV><FONT face=Verdana size=2>gycerine</FONT></DIV>
<DIV><FONT face=Verdana size=2>Gum arabic and egg are both used as carriers for the pigment or <EM>sovlents</EM>.</FONT></DIV>
<DIV><FONT face=Verdana size=2>Ox gall(not to be confused with blood) is used to break water surface tension and makes water colors "flow" better.</FONT></DIV>
<DIV><FONT face=Verdana size=2>Gycerine is used to retard drying--both tempra and watercolor are know for fast drying speed.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Verdana size=2>I know nothing of Ox blood--couldn't find it in my book.  I know that tempra has great longevity--there are egg tempras which are pretty and vibrant after 100s of years.  Oil darkens with age.  As for the decay rate of the organics, don't know.  Keeping dry is better for works of art...so...may not be advisable to use some additives in places that are moist.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Verdana size=2>On another note, Bioshield makes a new clay paint(no VOCs) that's worth checking out:</FONT></DIV>
<DIV><A href="http://www.bioshieldpaint.com/">http://www.bioshieldpaint.com/</A></DIV>
<BLOCKQUOTE style="BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
<DIV style="FONT: 10pt Arial">----- Original Message ----- </DIV>
<DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A href="mailto:tms at northcoast.com" title=tms at northcoast.com>Charmaine R Taylor</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To: </B><A href="mailto:tms at northcoast.com" title=tms at northcoast.com>dello.mo at libero.it</A>
<DIV style="FONT: 10pt arial"><B>Cc: </B><A href="mailto:tms at northcoast.com" title=tms at northcoast.com>coblist at deatech.com</A></DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> 8/27/02 12:05:15 PM </DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Cob: organic materials for earthen plaster ???</DIV>
<DIV><BR></DIV><FONT size=2>
<P>
<DIV>hI Mohamed- Why don't you explain the " Horasan "  recipe you mention?</DIV>
<DIV> </DIV>
<DIV>We would like to know what the materials are.</DIV>
<DIV> </DIV>
<DIV>I have not heard of egg  white in clay, but of egg Yolk to make a</DIV>
<DIV>tempura paint wtih lime.</DIV>
<DIV>OX BLOOD IS USED AS A HARDENER AND WATERPROOFER IN CLAY/COB, AND PEOPLE</DIV>
<DIV>ALL OVER THE WORLD HAVE USED WHAT THEY HAVE...MUCH OF THIS INFORMAITON</DIV>
<DIV>IS LOST.</DIV>
<DIV> </DIV>
<DIV>opps..caps lock...</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>Ms. Charmaine  Taylor/ Taylor Publishing</DIV>
<DIV><A href="http://www.dirtcheapbuilder.com">http://www.dirtcheapbuilder.com</A></DIV>
<DIV><A href="http://www.papercrete.com">http://www.papercrete.com</A></DIV>
<DIV>PO Box 375, Cutten (Eureka) CA 95534</DIV>
<DIV>707-441-1632</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
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