Czx7 Posted Tuesday at 04:45 PM Share Posted Tuesday at 04:45 PM Im looking at making some TPA flash and I was going to default to just using the diaper method as that is the a tried and true method. I was wondering if with the decrease in shock and friction sensitivity of TPA flash would it be safe to just screen the chems together or would that be unwise. If there is a quicker and more effective method that the diaper method please share. Thanks. Link to comment Share on other sites More sharing options...
Carbon796 Posted Tuesday at 05:12 PM Share Posted Tuesday at 05:12 PM (edited) The safest way, is clearly going to be the diaper method. Can you screen it, sure. But, I also routinely screened mixed 8:3:2. True TPA based flash. When properly processed, was a granulated product. It is at this point, where it was proposed to be a safer to handle product. In larger quantities, in power form it's possible for it to self contain. Edited Tuesday at 05:13 PM by Carbon796 Link to comment Share on other sites More sharing options...
Czx7 Posted Tuesday at 06:40 PM Author Share Posted Tuesday at 06:40 PM Thanks for the input. I don't plan on making more than 100g at any given time so I don’t think self confinement is a problem. Link to comment Share on other sites More sharing options...
pyrojig Posted Thursday at 02:31 PM Share Posted Thursday at 02:31 PM There is always the closed container / shell mixing approach. All unmixed components are added , container closed and during the movement of or pasting, the container it is in makes a complete mix Link to comment Share on other sites More sharing options...
Czx7 Posted Friday at 04:03 PM Author Share Posted Friday at 04:03 PM By movement do you mean like a small star roller that tumbles the mix? Link to comment Share on other sites More sharing options...
Carbon796 Posted Friday at 07:32 PM Share Posted Friday at 07:32 PM (edited) He's talking about the binary mixing method. For small ball shells or rocket headings. The " container " is the shell hemi's themselves. Is there a particular reason your wanting to make TPA based flash. It's only real advantages are " safer and cleaner handling " for larger batches ( multiple pounds ) while filling multiple ( 10's of ) salute/report cases. Once it is granulated. It still is not without risk though. It is still a hot and energetic burning composition. Should you have an accident during processing. Usually confinement for it needs to be very good, as well as a good ignition source. It's usually not recommended for smaller reports. Edited Friday at 07:54 PM by Carbon796 Link to comment Share on other sites More sharing options...
DavidF Posted Friday at 08:00 PM Share Posted Friday at 08:00 PM There's a tutorial on this site with a link to a video on making and granulating this stuff, if anybody is interested. The member has now passed on, but the video is still active. Link to comment Share on other sites More sharing options...
pyrojig Posted 13 hours ago Share Posted 13 hours ago (edited) Please do share … I recently saw a members Italian shell building project using a flash coated bp granulation mix . All claims to be very hot. Even heard of members coating rice hulls with flash , or other inert materials 🧐. Binders usually a nc or shellac type , red gum alcohol bound.etc. Hell even guys pressing flash fueled rockets , amazing the things you can do with vitamin F 🫣 Edited 13 hours ago by pyrojig Link to comment Share on other sites More sharing options...
DavidF Posted 13 hours ago Share Posted 13 hours ago It's here: Link to comment Share on other sites More sharing options...
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