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Digital BW, The Print

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Re: [Digital BW] Coating (was Faux Meyer Rod - first dMax test results)

2002-12-10 by Ernst Dinkla

Paul,

> >> I am down to near the bottom of the quart can of Hydrocote I first
> >> purchased, and I think I've noticed a  viscosity increase.  ...
>
> >Is there any chance the viscosity increase is actually 'Hydrocote
> >polymerised' or just solids sinking / solvents evaporating ? One would
> >expect polymerisation to happen on top of the liquid of course.
>
> I think some polymerization is a distinct possibility.  I'd be most
> concerned if it occurred in clumps -- making a smooth application tough.
>
> I'm wondering if we ought to stir the mix very well when first purchased
and
> pour it into several smaller bottles.  The 4 oz./ 110 ml. ink bottles come
> to mind as possible candidates.

I have not the faintest idea how fast it polymerises. Whether they have done
any stuff in it to prevent polymerisation in the can itself. Mixing the
varnish first with the Fish Eye/Leveling additive and then pouring it in
smaller polyethylene bottles where you can squeeze out the extra air may be
a good idea. Put a marble in too. Then you can shake the bottle without
mixing air in the liquid. But I have not the fainte ........

Erns

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