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Shane Frye
Chemistry
31 October, 10:05
What is the usual composition of acid etch?
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Jaqueline Macdonald
31 October, 10:18
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Here's what I get
Explanation:
The etching gel used in many dental procedures contains
10 % to 50 % phosphoric acid in water a thickening agent consisting of hydrocarbon polymers and a colloidal silica sol a colouring agent such as cobalt aluminate blue spinel (CoAl₂O₄) to make it visible on a tooth.
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