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bangkokpyro

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Everything posted by bangkokpyro

  1. bangkokpyro

    coating magnesium

    Yes sure they survived the break... they are like concrete when dry. I always use cut stars. Just add enough Acetone to the mixed comp in a stainless steel bowl till it's tacky and like bread dough and knead it together for a minute, roll it to the thickness of the star you want and cut it into cubes with a straight edge sharp knife. It's important that the PVP is fine mesh.... around 200 mesh or finer or It's not going to bind well and you need to buy your PVC powder already fine as you cannot grind or mill it any finer later. Magnalium for these stars also needs to be very fine 325 to 400 mesh works best.
  2. bangkokpyro

    coating magnesium

    I've use both the Barium Nitrate and Strontium Nitrate versions of this star both with fine powder form PVC bound with Acetone, the Acetone dissolves the PVC no problem and makes rock hard stars. If you do it like that there is no problem with reaction of the Nitrates and the Magnalium and no need to coat the Magnalium with anything. The stars are dry in around an hour and done outside well away from any ignition source and wearing a solvent mask it's pretty safe. These stars are hard to beat for colour saturation and brightness.
  3. bangkokpyro

    Wooden Case Formers

    I have too many prices to post on forum ,it depends on what type of wood, what size, how heavy,what type of finish etc etc, also I give different price for set of formers than for just one piece. but this gives you some idea Prices including postage to Netherlands Solid Hardwood former for 3 inch shell 34 GBP Solid Hardwood former for 4 inch shell 58 GBP Insert former 1 1/2 inch 16.50 GBP Insert Former 1 3/4 inch 18.00 GBP Solid Teak 6 inch 118.00 GBP Just email me for a complete price list. Thanks Paul
  4. bangkokpyro

    Wooden Case Formers

    I have some special deals on my formers between now and the new year. Why not Buy yourself the Christmas present you deserve? All Thai Yang hardwood formers 15% off. Buy a full set of Insert formers and get 20% off. (Yang Hardwood only) All Teak formers under 5 inch Diameter 5%. Offer till Dec 31st only or till stocks run out. Just Email me for a full price list of my formers and other Pyro related Items I sell. Bangkokpyro@hotmail.com
  5. bangkokpyro

    Quiet English Section

    Hi I'm new to this forum and unfortunately I can't speak Dutch so I'm stuck here in the English section where there seems to be very little going on. I have been making Italian style cylinder shells in sizes from 3 to 8 inch for a few years now and would be happy to help anyone if they need any advise.
  6. bangkokpyro

    Quiet English Section

    Not bad at all, you can get alot of feedback from dutch members, because we speak englisch as a second language most time. Can you tell me how many lift is needed for a 5 inch cylinder per gram of finished shell? I use willow pulverone lift and less than 5 mm between shell and mortar. I think I will blow my shell to the moon with 10% Yes I see most Dutch speak English very well. When you say 'willow polverone lift' do you mean it is unmilled B.P lift? There are some variables in calculating the amount of lift needed for a particular shell. round or cylinder type shell - Shell Diameter and clearance in the mortar - single or multi break - weight - type of lift powder you intend to use - how high do you want to put the shell etc etc As a rough guide 1 Oz per Lb (28gms per 450gms)of shell weight is about right for a single break round shell if using commercial lift powder like Goex or Wano brands. Cylinder shells normally have a little less clearance in the mortar than round shells so you can use a little less. A 5 inch cylinder shell is going to weigh between 1.5 and 2Kg and I would use between 90 and 120gms if using commercial 2F powder. Now if you are using homemade powder you might need more or less than this amount depending on the quality and granulation of your lift. I don't like ballmilling and see no point in it for shells over 3 inch so I make all my lift powder by a simple screening of the fine ingredients 3 times through a 40 mesh screen, moisten with water then granulation through a screen to 2F size (passing a 4 mesh screen but retained on a 12 mesh screen) I use 3% SGRS as a binder. This powder is not as strong as commercial powder but what the hell ..... it's quick to make, cheap and safer to make than ballmilling/pressing pucks/corning etc and it works just the same ......you just need more of it. For this rough mixed powder I use approx 160 gms for a 5inch shell.
  7. bangkokpyro

    Quiet English Section

    Hi shells on video I only have big big files and have not figured out how to compress/reduce the file size. Chemicals in Thailand ? yes not a problem as I run a small firework company. I make cylinder shells for the domestic Thai market in sizes 2 to 8 inch. Actually most explosive devices used by terrorists nowdays are a bit more sophisicated than flash or pyrotechnic firework compositions so you can still get pretty well anything here without restrictions.
  8. bangkokpyro

    Wooden Case Formers

    Yes sure, that would be good to pin the topic thanks.
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