Crazy Swede Posted January 9, 2018 Posted January 9, 2018 ...I also have a feeling that you might be the first guy to ever make a blue strobe... The first?Doesn’t the results from Jennings-White and Juknelevičius count? By the way I have heard that someone actually produces blue strobe shells for Disneyland in Hong Kong (or was it Disney Resort in Shanghai?). Apparently the stars are not completely stable since rumour has it that the shells cannot be stored but must be used within a week or so. I don’t have the formulation unfortunately.
rogeryermaw Posted January 9, 2018 Author Posted January 9, 2018 (edited) First? No. Of course in all the reading, research and speculation, I've never seen one. Nor met anyone who has seen or made them. What I'm hoping to do is put it within reach of people like us. it is the journal paper of Dominykas Juknelevicius that i am following and, so far, the comps as listed do not produce a satisfactory strobe. i will admit, however, that i do not have a press and that may, in part, be affecting my results. Edited January 9, 2018 by rogeryermaw
rogeryermaw Posted April 8, 2018 Author Posted April 8, 2018 (edited) Got some tweaking to slow the burn rate but this is a nice, pure blue imo Edited April 8, 2018 by rogeryermaw 1
rogeryermaw Posted April 8, 2018 Author Posted April 8, 2018 I started with the Hardt blue #1 then gutted it to use with phenolic resin. No stearic acid or dextrin.
OldMarine Posted April 8, 2018 Posted April 8, 2018 I recently tried the Veline colors with resin as a fuel and binder and was unimpressed with the blue. I may try the Hardt modified as you've done to see if it will work better. Thanks!
Bigmark Posted April 17, 2018 Posted April 17, 2018 Man Roger thank you for all the hard work you put into this. I like that chlorate green too.
stix Posted April 17, 2018 Posted April 17, 2018 Yeah, that blue with the glitter looks really really nice. Why is it that blue is so hard to create, but also looks the best? (imo)
MadMat Posted April 17, 2018 Posted April 17, 2018 (edited) I have done a bit of research into blues and found that the main problem (among a few others) is temperature. You need a large flame front in your composition to produce the CuCl blue emitting species in the volume necessary for decent color. Not to mention the light itself is produced by the heat of the flame. Unfortunately, the CuCl species is destroyed if the temperature gets too high, which generally happens when you have a large aggressive burn. So you have to find a happy middle-ground to produce a decent blue. One thought I would like to investigate in the future is the use of bromine instead of chlorine for producing blue. From what I have read so far copper bromate might be a nice choice in that it would be both colorant and oxidizer in a formula. Edited April 17, 2018 by MadMat
Mumbles Posted April 18, 2018 Posted April 18, 2018 I've had similar thoughts MadMat. The CuBr emission spectra is supposed to be a little bit more of a pure blue. My focus was mostly on bromine donors. There are some industrial chemicals that are pretty similar to what we currently use as chlorine donors. Most are sealants and flame retardants.
MadMat Posted April 18, 2018 Posted April 18, 2018 I haven't looked into the actual make-up of them yet, but there are bromine sanitizers for hot-tubs (I believe bromine is more stable at the higher temperatures present in hot tubs than chlorine). I've just been too busy lately and my pyro work is suffering
rogeryermaw Posted April 26, 2018 Author Posted April 26, 2018 (edited) mumbles if you see this, i have recently come across woelen's excellent write up on sci mad of the electrolytic synthesis of potassium bromate in a cell that runs similarly to the chlorate cells with some variation to the voltage and current. what i wonder is could a similar process be run on copper bromide (specifically copper(II)bromide as the copper(I) variety has very low solubility)? also shoot me a pm if you get time. how is life in the mountains treating you? Edited April 26, 2018 by rogeryermaw
Sulphurstan Posted April 26, 2018 Posted April 26, 2018 Just have read this thread, and want to thanks Roger for his intensive work and sharing!I also tried the blue strobes lately, but the AP and metallic copper formulas were to unstable for me... I'm thinking of using something with copper benzoate, bismuth trioxide, MgAl, baryum nitrate... Nothing good yet.
rogeryermaw Posted May 10, 2018 Author Posted May 10, 2018 A pink comp that is actually pink!??!!? Not hot pink. Not magenta. PINK!!!Thanks so much for letting me try it out.
rogeryermaw Posted February 7, 2019 Author Posted February 7, 2019 been spending some time at Caleb's machine shop making tools: tools which i have been enjoying immensely:
rogeryermaw Posted February 7, 2019 Author Posted February 7, 2019 (edited) Edited February 7, 2019 by rogeryermaw
dagabu Posted February 7, 2019 Posted February 7, 2019 Keep 'em coming! Nice stuff, good to see Cal's machines getting a workout.
rogeryermaw Posted February 7, 2019 Author Posted February 7, 2019 (edited) this one...this fuel...me like! that sound is mean! Edited February 7, 2019 by rogeryermaw
Mumbles Posted February 17, 2019 Posted February 17, 2019 Glad to see you and Cal have been having fun.
rogeryermaw Posted August 30, 2019 Author Posted August 30, 2019 so thi first time i made this formula, it was pretty but i asked Mumbles if he had any criticisms and he stated that i should maybe make the stars a bit smaller. finally got around to trying it again and have been working on my pasting technique since then as well. as usual, Mumbles was right. the effect was far superior:http://www.youtube.com/watch?v=tHs4c3G_25Mhttp://www.youtube.com/watch?v=v_OL_hvYCdU apparently, i don't remember how to embed here.... 1
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