Talk:Black Powder Manufacture

From PyroGuide

I don't want to edit your nice page before you end making it so i decided to share this information here instead, Using a large speaker or anything useful to create vibration, one can improve even more recrystallization by sitting the mixture on the speaker running at large amplitude and medium/high frequency (be carefull for the ears), and pouring the cold mixture of alcohol, on a microscope scale this change the look and the size of the kno3 crystal for the good.

-pyrOstar

Groovy powder. Didn´t know that. Did you try it out and did you realize improvement? The page (methods) will be done in April I assume, I´m busy as hell at the moment. Regards --AdmiralDonSnider 04:51, 24 March 2009 (EST)

Under the "Improving the CIA approach" heading it says "Not least because alcohol remains liquid far beyond the freezing point of water, it will take a long time to cool it down properly." I don't believe this is correct.

The melting point of a substance is not related to it's specific heat and as far as I am aware the most common alcohols (ethanol, methanol and isopropyl) all have a specific heat lower than water which means that they would cool down quicker.

Also, when a substance changes phase there is an energy transfer with no associated change in temperature (removing the heat of fusion). Since alcohol will not undergo a phase change it should cool even quicker than a substance which does.

I probably could have just deleted that sentence, but like pyrOstar I didn't want to mess with your work without first explaining why. -- Mike_au

Thanks for pointing this out. I will consider a change when I finish the article. I thought it would take longer because when I start cooling a the same temp as in the case of water, but can make it cooler, it will take longer. I also got the impression when doing this in practice. you may be right however.--AdmiralDonSnider 05:23, 28 March 2009 (EST)

i did try this method some time ago but wasn't equipped to get quantitative result but it seem like there was an improvement, better trying it out again and quantify the impulse. Mike_au is right about the cooling time, water take a lot longer than alcohol for the very reason he tell. -pyrOstar 21:26, 30 March 2009

Just a quick one. Why do you say in your BP comparison table that 3 component ball milling is unsafe. 3 component milling has been used for many centuries. Yes the odd mill has gone up, but that is usually attributable less than perfect milling conditions such as contamination and poor choice of media. -digger

[edit] BP Mfg

Any idea when the enhanced CIA method will be completed? It's kind of like reading a great mystery and finding out the last chapter is missing. The suspense is killing me. (LOL)Thnx tgavalliere

I´m sorry for the delay, it´s now almost a year since I did the first edit on BP manufacture. I just didn´t have enough time and/or energy to finish it, but I promise you that I´ll do that soon (within the next weeks), as I´ve more time for the wiki again. Thanks for your interest! --AdmiralDonSnider 01:28, 7 October 2009 (EST)