[BProckets] NC chemistry help requested.

[Dan Durachko]

Flint:

As per Sleeter's book you may want to simply titrate the amount of lacquer.
2.9, 2.8, 2.7 ml per 10gr until you get no CATO's.

*****

Here is my problem - 
I tried using NC at a concentration of 1ppb in 100cc
acetone (ping pong balls = ppb). Adding 3ml of NC
laqour to 10gr of BP does the trick and
casting/ramming is easy.
It's even easier to work with, and the flight is WAY
WAY better!!! A VERY rapid liftoff and flight. Very
impressive. Far superior to the rest of the binders
(no surprise though). 
 BUT - 
Out of 3 motors 2 will fly like a bat from hell, but
the last one will cato (crossette like!).
I'm assuming the problem lies in cavities left by the
evaporating acetone, even tough I'm ramming the stuff.

How can I slow the acetone evaporation down??? 
Will some ethanol added to the acetone help?
[I'll try higher NC concentration soon]