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sureco
Joined: 02 Jul 2006
Posts: 1
Location: India
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 Posted: Sun Jul 02, 2006 1:48 am Post subject: Calcium Carbonate Binding Agent |
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| What binding agent is added to calcium carbonte to make Dustless School chalk. |
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KING LUAN HAN
Joined: 05 May 2007
Posts: 2
Location: vietnam
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| Posted: Sat May 05, 2007 8:51 am Post subject: dustless chalk |
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very simple, it's gypsum so called plaster of Paris. Try this formula;
100ml water
50gr caco3
mix both well,then add:
75gr gypsum
stir and transfer them in mold fast, the formula will thicken in only 3 minutes. |
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Guest
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| Posted: Sun Jan 13, 2008 6:27 am Post subject: Re: Calcium Carbonate Binding Agent |
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Dear Sirs/Madames,
I am finding the way to make a trial with dustless chalk but as I found
from the internet, it's hard to get out the ingredients. I also made a
search from your freepatentonline but I did not find out. So, I write this
to you as a request to show me some webpages, some patents (or would
you please tell me if possible) about the proportion of ingredients of
dustless school chalk. Maybe a full description. Thank you very much and wait for your reply soon!
Regards, |
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