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Chris Fletcher
Joined:
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20-Apr-2004
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Started On : 04-Apr-2009 at 12:56:53 AM, #Views : 6313
Topic Subject : RE: A new topic has been added-Earthium cast failed! HELP! |
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Brenda
First lets make sure you are using what you say.
Earthium is a two part alginate, the only one I am aware of. It has a part A
and B. A is the alginate and B is the catalyst(may not be the correct terms
but it explains how/why to mix).
In your email you said 6c water 3c alginate 1c artcast cement then mix.
This will not work.
It should be 6c Water + 3c Part A + Aprox. 1TBSP Part B
The Artcast cement is equivalent to the plaster you poured in afterwards.
The temperature of the water affects the setting time.
The quantity of part B affects the set time and it is this feature that I
really love about Earthium. I can have set times from 30secs to 1 hour just
by varying the proportion of Parts A to B.
To use properly mix the water and part A and set aside. It will not harden
I have left it sitting in a cool room for two days before use. Now mix part
B, I usually mix it 2:1 as well for example 2Tbsp water to 1Tbsp Part B.
Part B will settle if you let it sit so make sure to mix it before adding it
to Part A. There should have been a chart explaining the proportions and the
set time for each. Mix mixtures A and B and stir well. Insert hand and wait
for a few i=minutes longer than the set time to insure that the alginate at
the bottom is set. Remove hand, mix plaster or artcast cement and pour into
mold. Demold 45+ minutes later. Check for proper time based on plaster or
Artcast specs.
The Website directions for Earthium is
http://www.lifecast.net/LCpage/Instr/1160/Inst1160.html
It is great material to work with because it offers lots of flexibility.
But is a little more complicated for the beginner because of that
flexibility.
Now if what you are using is a one part alginate then it isn't the Earthium
that I know. Just do not add anything else to the alginate but water. I
imagine that the Plaster could prevent the alginate from setting but have
never done that.
Good luck.
Chris
Chris Fletcher
Sculptor
-----Original Message-----
From: aliforum@lifecasting.org [mailto:aliforum@lifecasting.org]
Sent: Friday, December 19, 2008 2:28 PM
To: feel-the-art@cox.net
Subject: A new topic has been added-Earthium cast failed! HELP!( Message
No. 1992)
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Hello Chris Fletcher
Post Date : Friday 19th of December 2008 05:27:37 PM
Posted by : "Brenda Robson" bruthrobson@aol.com
Earthium cast failed! HELP!:--
I am a teacher trying to figure this out:
I mixed 6 c water 3 c lifecast powder 1 c artcast cement and stirred. It
was very lumpy even though I wisked it with an afro comb for 2 min. My
daughter put her hand in the 2 lt. bottle with velcro attached on the
inside. It didn't seem to be doing anything so she took her hand out after 6
min or so. Then we added 2 more cups of the artcast and it seemed to work
fine.
I added 2 cups plaster mixed 1 cup of water and poured it in.
Next day it was still oozing slightly on the bottom. When we peeled away
the green outer part it sort of fell off in a wet way and the fingers came
with it. They were not shaped right at the tips and the whole thing is
covered in bubble bumps. I know IT LOOKS AWFUL!
My daughter is trying to get a portfolio together for a magnet art high
school so I need help asap!
What did I do wrong?
Can someone help me with my measurements, etc??? I need 6 c of solution and
1 c of plaster.
ALI is an international organization whose members are engaged in the art
and creative industries. Its purpose is to promote the art of life casting
create public awareness of this unique art form, provide its members with
forums to exchange information, resources to enhance their effectiveness and
advance opportunities for their artistic success.
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