TigerTail Posted July 13, 2011 Posted July 13, 2011 (edited) I have seen a couple of videos which show some Chinese ladies closing the ends of firecracker tubes for firecracker strings using a wet clay like substance. What is this clay and doesn't it contract/shrink on drying? Edited July 13, 2011 by TigerTail
dan999ification Posted July 14, 2011 Posted July 14, 2011 I have seen a couple of videos which show some Chinese ladies closing the ends of firecracker tubes for firecracker strings using a wet clay like substance. What is this clay and doesn't it contract/shrink on drying? ive seen this too but different types of clay are used was it white, pink, orange or pink and white. the only wet clay ive seen is like a paste consistency and dried in the tubes with what i can only describe as a giant hairdryer/heatgun i dont know if it contracts when drying but it wouldn't be a problem for firecrackers with f or good bp a hole in the tube would'nt really affect performance some firecrackers are just crimped at the ends leaving quite a sizeable gap for gasses to escape [and comp to fall out] its all about the speed of gas production or the brissance depending on the comp the pink and white is compressible usually mixed i think for integrity pink being softer and the white being harder giving something to bite into it doesn't require drying this is normally used to seal bombettes using gentle pressure not rammed.dry orange clay is rammed into the bottom of cake tubes and the fuse end of bombettes. sorry i cant identify the different clays/mud im willing to bet its a chinese secret and or not for sale to the public.wheres my shovel?dan.
dagabu Posted July 14, 2011 Posted July 14, 2011 ive seen this too but different types of clay are used was it white, pink, orange or pink and white. the only wet clay ive seen is like a paste consistency and dried in the tubes with what i can only describe as a giant hairdryer/heatgun i dont know if it contracts when drying but it wouldn't be a problem for firecrackers with f or good bp a hole in the tube would'nt really affect performance some firecrackers are just crimped at the ends leaving quite a sizeable gap for gasses to escape [and comp to fall out] its all about the speed of gas production or the brissance depending on the comp the pink and white is compressible usually mixed i think for integrity pink being softer and the white being harder giving something to bite into it doesn't require drying this is normally used to seal bombettes using gentle pressure not rammed.dry orange clay is rammed into the bottom of cake tubes and the fuse end of bombettes. sorry i cant identify the different clays/mud im willing to bet its a chinese secret and or not for sale to the public.wheres my shovel?dan. There are lots of videos on you tube showing the process and one I remember showed a small excavation process right on their site where the red clay was taken right from the ground, screened and rammed dry into the bottoms of cake tubes. -dag
TigerTail Posted July 14, 2011 Author Posted July 14, 2011 ..i dont know if it contracts when drying but it wouldn't be a problem for firecrackers with f or good bp a hole in the tube would'nt really affect performance...dan. Ah good point! The clay that I've seen in Chinese manufacture videos is white.In India, although I have never seen any manufacturing process, but judging from the end product, it seems a wet clay mixture is employed for the same purpose. This clay is orange/red.
Richtee Posted July 15, 2011 Posted July 15, 2011 There are lots of videos on you tube showing the process and one I remember showed a small excavation process right on their site where the red clay was taken right from the ground, screened and rammed dry into the bottoms of cake tubes. -dagCould use ground up kitty litter, prolly. With vitamin F it really does not matter. Dab of Elmers. Crimp in and done. Altho while I have made crackers, kinda a PITA for the effect really.
Ralph Posted July 15, 2011 Posted July 15, 2011 Could use ground up kitty litter, prolly. With vitamin F it really does not matter. Dab of Elmers. Crimp in and done. Altho while I have made crackers, kinda a PITA for the effect really. The arnt that much of a PITA if you have a good system going I spend mabey 20 second per salute half of which (inert work only) is done mindlessly while watching tv here are a couple pics pic Other pic tried adding them as pictures but apparently I dont have permission to use the file extention for pics in the gallery in this board :S
TigerTail Posted July 23, 2011 Author Posted July 23, 2011 Quoting 50AE from the thread 'Fastest way to build flash inserts?', ...many chinese firecrackers are plugged with something like a white clay - it smells like plaster of paris, but it isn't. It is like gypsum mixed with sand.
sumagg27 Posted June 22, 2016 Posted June 22, 2016 Yes many Chinese firecrackersmany chinese firecrackers are plugged with something like a white clay .this type of powder take moisture and convert hard fome(English is not my mother language). Anyone know what is that powder which one take moisture from air and converted in hard fome.
OldMarine Posted June 22, 2016 Posted June 22, 2016 GypsumPlaster of Paris is made by heating gypsum. There's a couple of other carbonates that set up as well but I can't remember them offhand.
sumagg27 Posted June 22, 2016 Posted June 22, 2016 There are also combination of two or three more substance? Which make it sticky to hold paper and fix in tube end.
OldMarine Posted June 23, 2016 Posted June 23, 2016 I would think a resin filled with an inert material such as kaolin or bentonite clay would work.
schroedinger Posted June 23, 2016 Posted June 23, 2016 An other question, why do you even want to wet close a tube at all. Just dry plug it.
sumagg27 Posted June 23, 2016 Posted June 23, 2016 What about this type composition? PoP or gypsum White cement White starch(which uses make dextrin). Some small amount of sodium salt which attract moisture to get wet entire mixer.Yes just trying dry plug 1
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