how do you make chalk?
2007-09-24 12:12:23 · 5 answers · asked by bobatea 3 in Arts & Humanities ➔ Other - Arts & Humanities
"you must first create the universe" (-Carl Sagan)
Chalk comes from little things that live in the sea. Their shells sink to the bottom and stack up and stick together and migrate to land (sometimes). Then it becomes chalk cliffs and can be mined. It is called calcium carbonate and you might get some if you dissolve a sea shell in vinegar, then add some base or otherwise change the ph.
2007-09-24 12:19:01 · answer #1 · answered by A Guy 7 · 2⤊ 1⤋
You can make chalk from ground eggshell, flour and very hot water (food colouring too if you want to colour the chalk). It can take up to 3 days to set.
2007-09-25 08:33:34 · answer #2 · answered by Opalfire 3 · 0⤊ 0⤋
Chalk used to write on black boards is Calcium Sulphate not Calcium barbonate.
TW K
2007-09-27 08:05:56 · answer #3 · answered by TW K 7 · 0⤊ 0⤋
Calcium carbonate.. .you mine it, grind it into powder, mix with a binding agent, mold into required shape, bake. Bingo. Chalk.
2007-09-24 19:21:06 · answer #4 · answered by Galen W 3 · 0⤊ 1⤋
I think it from a rock......maybe?
2007-09-24 19:28:50 · answer #5 · answered by MaryKate 2 · 0⤊ 0⤋