A little fun on a small scale
#1
Posted 20 November 2012 - 11:05 PM
maybe multi break hahahaha , maybe.
Iv got a few ideas but would like some from you guys.
Paul.
2KNO3(s) + 3C(s) + S(s) -----> N2(g) + 3CO2(g) + K2S(s)
#3
Posted 21 November 2012 - 07:58 PM
Failing that just a straight forward comet cake would be quite an achievement!
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#5
Posted 22 November 2012 - 01:45 PM
its definatly a challenge.
Paul.
2KNO3(s) + 3C(s) + S(s) -----> N2(g) + 3CO2(g) + K2S(s)
#6
Posted 22 November 2012 - 08:32 PM
#7
Posted 22 November 2012 - 08:54 PM
Im having a bit of a problem with these, when they pop they just shatter (lots of bits), so the mission is on to find a really tuff Comp thats easy to pump a crossette with. crossettes can be a pain at the best of times but on a miniture scale its a whole new ball game.
Paul.
2KNO3(s) + 3C(s) + S(s) -----> N2(g) + 3CO2(g) + K2S(s)
#8
Posted 22 November 2012 - 09:45 PM
Also what do you use to break them?
Edited by Sparky, 22 November 2012 - 09:45 PM.
#9
Posted 22 November 2012 - 09:49 PM
The Crossettes im making
Im having a bit of a problem with these, when they pop they just shatter (lots of bits), so the mission is on to find a really tuff Comp thats easy to pump a crossette with. crossettes can be a pain at the best of times but on a miniture scale its a whole new ball game.
Paul.
I made a shell full of 3/8 crossetts once,and only once,time consuming and very fiddly.
#10
Posted 23 November 2012 - 12:30 AM
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#11
Posted 23 November 2012 - 06:30 PM
Have you tried a parlon based comp. When those suckers dry they are as hard as stone. You'd more like pouring a cast rather than pressing though.
Also what do you use to break them?
Parlon is a no go, way to sticky messy clog everything up.
iv been trying alsorts, its down to the tiny 6mm crossettes not holding together, i will get their in the end.
Paul.
Yeah the 15mm are fiddly enough, 6mm is a nightmare.
Paul.
have you tried resorcinal resin? I use it to make comets and they come out of the press ROCK hard and if allowed to harden a few hours in the warm are like stone!
Phill i hadnt thought of using the epoxy, i may give it a go, did you have any problems with the comp sticking to the tooling after each press and what comps were you using.
im thinking of a glitter for the little crossetts, i wonder how much negative impact the epoxy would have.
Paul.
2KNO3(s) + 3C(s) + S(s) -----> N2(g) + 3CO2(g) + K2S(s)
#12
Posted 24 November 2012 - 01:06 AM
Ive a favourite which is based ona white star I modified as yes the resin can effect the stars nature sometimes. Usually a few % extra oxidiser compensates well though.
Cant rcall using it with glitters but it should be fine, not too fond of unprotected Mg or MgAl though, Al is fine from memory but any Mg content requires linseed oil coating first or they crack after hardening a few days later.
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