Hello once again, I have a few more questions concerning Technovit 9100 New. For which purpose it is necessary to generate a vacuum around themould during the polymerization (it is written in the manual)? To getrid of bubbles? To excluded oxygen during the polymerization process? =0AFor which purpose it is necessary to have sealed embedding moulds (it=0Ais written in the manual)? To prevent evaporation of thepolymerization mixture? To excluded oxygen during the polymerizationprocess? Simply, in the manual it is written that no air should be inside theembedding mould. And I cannot understand why it is written. Isadequate polymerization possible in the presence of air oxygen? Thank you! Andrey Ivanov 
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