In a message dated 3/4/06 6:35:32 am, rs@silvergrain.org writes:
> Furthermore, the alcohol groups in PVA is _secondary_ alcohol and so
> they undergo usual alcohol reaction, such as oxidation. So alcohols
> can be oxidized to _ketone_. Commercial PVA is likely to have
> residual acetates and a small fraction of ketones made by oxidation.
>
Does this have any effect on the suitability of 'commercial' PVAs for the
purpose of gum printing ?
The one I have here seems to work well enough.
Terry
Received on Mon Apr 3 01:19:19 2006
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