| Hobby Forum Index » Pyrotechnics » Adding solvent to NC laquer to slow down evaporation?... |
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| FlaMtnBkr... |
 Posted: Sat Oct 03, 2009 11:17 am |
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I was about to make another batch of dragon eggs and thinking back on
the last time I made them they seemed to dry out to quickly to cut
them well. It's like the outside forms a crust almost immediately
which then makes cutting them turn into a mess.
I was wondering if substituting a portion of the acetone with another
solvent will slow down the drying time of the laquer? Something like
Xylene or mineral spirits?
If there is a solvent for NC that can be added is there a good percent
to add to the acetone? I don't want them taking days to dry out
either. It would be nice to have a good 10-20 min working time.
Any suggestions? A couple searches did not turn up a clear answer.
Thanks!!! |
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| FlaMtnBkr... |
| Posted: Mon Oct 05, 2009 12:30 pm |
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On Oct 4, 10:31 am, "Don T" <-paint... at (no spam) louvre.org> wrote:
Quote: My thought on reading the question was that the quantity of acetone to
nitrocellulose was to high which caused the mix to skin too quickly and 'dry
in'. I think he should first try a thicker NC mix before going to other
solvents or ethyl alcohol addition. I've never needed different solvents but
then again my batch size is limited to one pound at a time.
I use 15% NC lacquer. I have used thicker but from what I remember the
same thing happened. I think I still have some thick stuff mixed up
and might try it in a small batch but will probably give the alcohol a
try first.
I normally only make 1/3 or 1/2 pound at a time. I would think if I
was making a bunch it would start drying out too quickly and become a
crumbly mess with my current process (which very well could need some
improvements). |
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| Lloyd E. Sponenburgh... |
| Posted: Mon Oct 05, 2009 5:36 pm |
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FlaMtnBkr <flamtnbkr at (no spam) gmail.com> fired this volley in news:009f4902-02e7-
42a8-8c48-12b632955881 at (no spam) h30g2000vbr.googlegroups.com:
Quote: I would think if I
was making a bunch it would start drying out too quickly and become a
crumbly mess with my current process (which very well could need some
improvements).
Modify your current process to include a spray bottle of solvent. As soon
as the loaf develops a "crust", mist it with acetone. If necessary, wait a
few moments for the excess wetness to evaporate.
LLoyd |
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