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31 October, 10:05

What is the usual composition of acid etch?

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  1. 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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