| If one or more of the slurry components reacts with the silica binder, dipcoat gellation may occur. |
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| To assure adherence of the dipcoat to the wax, prewetting in a suitable agent to remove mold parting lubricant and microscopically roughen the wax surface may be necessary. |
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| The dipcoat is sprayed with a coarse sand while it is still wet. |
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