50AE Posted November 3, 2008 Posted November 3, 2008 I think the advantage of two driving shafts is the better grip. Think about it - there are two shafts trying to turn the cylinder, versus a single shaft while the other is turned passively by the cylinder. After all, very nice mill. Congratulations.
joe609 Posted November 3, 2008 Posted November 3, 2008 Im back!!!! Not that many off you Knew me, it must have been well over a year since i last made any fireworks or posted here. Tis the season again though and got all nostalgic looking at some of my old videos of shells etc. I have to be honest i liked the red better!
mormanman Posted November 3, 2008 Posted November 3, 2008 Hey guys I have a question about formaldehyde and the cooking of charcoal. Is formaldehyde what the "smoke" is when we cook charcoal? I've tried to collect some in a glass jar and it liquefies and both are flammable. I'm getting all my information from Wikipedia so..... Here's a link.
oskarchem Posted November 3, 2008 Posted November 3, 2008 Since when is Formaldehyde flammable? I got a bottle of the stuff in my lab, and there's only a T++ and Corrosive pictogram on it.
Richtee Posted November 3, 2008 Posted November 3, 2008 Hey guys I have a question about formaldehyde and the cooking of charcoal. Is formaldehyde what the "smoke" is when we cook charcoal? I've tried to collect some in a glass jar and it liquefies and both are flammable. I'm getting all my information from Wikipedia so..... Here's a link. OK this ain't technical, really. It pertains more to smoking meats... but info is here...Wood smoking meat
mormanman Posted November 3, 2008 Posted November 3, 2008 Thanks Richtee. Oskar, where did you get it. I know in the US Home depot and Lowes nor Ace sell it.
Mumbles Posted November 3, 2008 Posted November 3, 2008 Formaldehyde always has been, and always will be flammable. Both the gas and solution are flammable. Unless your solution is under 5% formaldehyde, it should probably have a flammability warning on it. Check any MSDS and you'll see it has flammablility precautions. The flash point is above room temperature, but still reasonably flammable. Formaldehyde is certainly possible to produce in these circumstances, but it is a gas at room temp. What you collected is probably a plethora of other organic compounds. Primarily water is given off, but there are probably enough oils and byproducts to make it flammable.
mike_au Posted November 3, 2008 Posted November 3, 2008 Looks like clear poly tubing over threaded rod for shafts...Will the poly tubing provide enough grip?Any particular reason to have two drive shafts, rather than one and a idler? My initial design had one powered roller and one idler, the idler would support the jar while the powered one just slipped underneath it. So I had to power up the second one. I initially had rubber heater hose (like you have in your car), I replaced it with the clear stuff in an attempt to reduce the diameter of the rollers (in order to slow the jar down). Since both rollers are now powered (and I have added some rubber around my jar, you can see it in the top left of one of the pictures) it doesn't appear to slip at all.
oskarchem Posted November 3, 2008 Posted November 3, 2008 (edited) Bizarre, I have a 30% solution in front of me, and there's only the Corrosive and Toxic pictogram. Aha, OK, I just looked at 4 different MSDS's and three of them state that formol isn't flammable, and the fourth one that it's moderately flammable at 37%. @Mormanman: I got mine in a shop in the center of Brussels. They have a shit load of chemicals as well as chemistry glass ware. Now I need to go put the bottle back, it's bloody freezing in my lab, it's gotta be like 5°C... Edited November 3, 2008 by oskarchem
Frozentech Posted November 4, 2008 Posted November 4, 2008 Hey guys I have a question about formaldehyde and the cooking of charcoal. Is formaldehyde what the "smoke" is when we cook charcoal? I've tried to collect some in a glass jar and it liquefies and both are flammable. I'm getting all my information from Wikipedia so..... Here's a link. The liquids from destructive distillation of wood that you are collecting are probably mostly methanol, turpentine, water, and like Mumbles said, a veritable stew of VOC's (liquid cancer in a jar, basically).
tentacles Posted November 4, 2008 Posted November 4, 2008 MM: Perhaps that is methanol, as in wood alcohol. Supposedly it is produced by the destructive distillation of wood (making charcoal). I'm sure it's not very pure, lots of water in there, as well as other organic flammables.
Mumbles Posted November 4, 2008 Posted November 4, 2008 Methanol, and all the others mentioned are very viable option. I'm not sure what kind of MSDS you're looking at, but every reputable MSDS I saw clearly states flammable liquid. JT Baker, Sigma-aldrich, Fischer Scientific, Pella, etc. This is for both 37 and 16% concentrations, as well as those without methanol preservatives. http://www.jtbaker.com/msds/englishhtml/F5522.htmhttp://www.sciencelab.com/xMSDS-Formaldehy...olution-9924095http://www.tedpella.com/msds_html/18508msd.htmhttps://www1.fishersci.com/wps/portal/PRODU...mp;fromSearch=Y
mormanman Posted November 4, 2008 Posted November 4, 2008 Could anyone help me start to find some in the USA?
tentacles Posted November 5, 2008 Posted November 5, 2008 What, formaldehyde? If all you need is a tiny bit, sometimes aquarium/pet shops have it in ~20% conc (maybe it was 39%?) as a fish medication. Did you check the "readily available chemicals" website?
mormanman Posted November 5, 2008 Posted November 5, 2008 I don't like using websites. I really never have unless it like ebay.
crazyboy25 Posted November 5, 2008 Posted November 5, 2008 I don't like using websites. I really never have unless it like ebay. Then: A: Get used to websites, your on one right now.B: Make it appear out of thin airC: Go to the local formaldehyde storeorD (my personal favorite):SHUT THE FUCK UP. Seriously? you don't like websites? Use your head.
flying fish Posted November 5, 2008 Posted November 5, 2008 (edited) Part of my Job as a product development technician for an exotic-technology based start-up company is finding exotic and obscure substances that we need for our "mad-scientist-type" experiments. Often times online vendors are the only option. But I can't complain...They are easy to find, convenient...and they've got the goods. Edited November 5, 2008 by flying fish
mormanman Posted November 5, 2008 Posted November 5, 2008 (edited) Then: A: Get used to websites, your on one right now.B: Make it appear out of thin airC: Go to the local formaldehyde storeorD (my personal favorite):SHUT THE FUCK UP. Seriously? you don't like websites? Use your head.Seriously? You've got to be fucking kidding me. You use you fucking head. God damn. We were not talking about research we were talking about ordering. Use fucking context clues and read just a little. I know you read more than me. I know my place on this forum but really was that fucking called for? NO!I don't know what your fucking problem with me is. I did nothing to insult you, at all. Edited November 5, 2008 by mormanman
TheSidewinder Posted November 5, 2008 Posted November 5, 2008 Both of you cease-fire. Next one to carp at the other gets a vacation. Clear?
oskarchem Posted November 5, 2008 Posted November 5, 2008 (edited) Soo... I guess Obama won the elections... EDIT: Maybe you could find some formol in a shop for fishermen. Here in France it's used commonly to kill the bacteria in the fish so you can hand it on the wall. Edited November 5, 2008 by oskarchem
Mumbles Posted November 5, 2008 Posted November 5, 2008 ... We were not talking about research we were talking about ordering......I know you read more than me. .... This is the point. We're not going to do the research for you. Look around, find common uses for it and you will likely be well on your way. You don't mention what you're trying to do so it's hard to help. It's all over once you figure out what it's in and where to find it.
WarezWally Posted November 5, 2008 Posted November 5, 2008 Obama won More funding for your favorite organisation, not to mention loss of your firearm freedoms down the track.
Swede Posted November 5, 2008 Posted November 5, 2008 Welcome to the dawning of a new era! "Hi, we're from the Government, and we're here to be sure you are safe. Is that a gun rack? I'll take those, thank you. Fireworks? Think of the children, man! We'll take those too. While we're here, would you kindly cut us a check? A big one? You have more than you need, we'll take the excess. Either that or we'll have to take you to prison."
mormanman Posted November 5, 2008 Posted November 5, 2008 (edited) Both of you cease-fire. Next one to carp at the other gets a vacation. Clear?Thank you. I apologies for retaliating like that. Mumbles, I know you guys won't do research for me and thats not what I'm asking. I'm asking for a flash light in a dark room or even a glow stick. My mom is a nurse and they don't use it to preserve remains any more. So I don't know where to start. Edited November 6, 2008 by mormanman
FrankRizzo Posted November 5, 2008 Posted November 5, 2008 Mormanman, Google "Resorcinol" and/or "Cascophen"
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