All recognise that for this oxidation the presence of three substances is essential: (1) The tannin to be oxidised. [Please select]
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If the above operation is carried out carefully, the colouring matter will be completely oxidised. [Please select]
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01 gramme glycerine) is calculated, and the oxidised glycerine solution run into this until oxidation is complete. [Please select]
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--It is often noted that some scrap is dark in colour, and in this condition it is generally spoken of as "oxidised" scrap. [Please select]
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--As a rule the scraps are picked over, and heavily oxidised pieces are sorted out; otherwise the crepe rubber prepared exhibits black streaks. [Please select]
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