granulated bp?

[chev385]

my granulures are real brittle, i added 5grams dextrin to a 100gram batch of bp. i then sun dried them for two days. does the sun have some kind of affect on this? or should i maybe find a way to compress the bp tighter. this was my first batch, any imput would be a great help.

[PyroJoeNEPA]

Did you use straight water or water/alcohol mixture to moisten it?

[chev385]

i used a mix of about 50/50

[whitepyro]

needs to be around 30 or 15% of alcohol otherwise the dextrin will not perform

[Chris H]

What exactly do you mean by brittle? They're supposed to be hard grains. Do you mean that the granules are not strong enough?

[Chris H]

What exactly do you mean by brittle? They're supposed to be hard grains. Do you mean that the granules are not strong enough?

[chev385]

@ Chris H, yep if u touch them they crumble

[johnybmb]

Well, if what you mean is that they crumble at the mere touching, then they are wet, so wait for them to dry a little more; however, if they crumble when you are pressing them between your fingers, they might need more dextrin. I use a 100:5 ratio of BP/Dextrin, wet the mix with a 30:70 by volume solution of Isopropyl alcohol in water (some say that a more concentrated solution can have a detrimental effect on bp) to a point at which the mixture stays together in a ball and granulate it through a coarse sieve; I catch the granules on a plastic tray (not on newspaper because the kno3 might leech from the bp) and then I dry them in the shade for about 2-3 days, and they are very hard.

[arial-shellz-R-US]

my friend tried binding BP with red-gum... the thing shot sooo freking high