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Myles Mulkey

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  1. Thanks Alan! Sounds like I need to really redo my whole workspace haha. The Powerflow sounds like some more bang for your buck. Is it comfortable? I like the look of how the Airshield seals over the face. Looks more comfortable to me, but then again I've read reviews of it being heavy and hard on the neck.
  2. Petr, hope you're doing better now that a few months have passed. I've been worrying more and more about this stuff jeopardizing my respiratory health. I'm still pretty young and I want to start taking precautions now. I've been looking at respirator options, and I have a few questions that I hope you guys can help me with. I'm looking at a couple of the cheaper options that keep getting mentioned here on the forum: The 3M Powerflow: http://www.amazon.com/3M-Face-Mounted-Respiratory-6900PF-Rechargeable/dp/B007TTNW28/ref=sr_1_2?ie=UTF8&qid=1451272269&sr=8-2&keywords=3m+papr The Trend Airshield Pro: http://www.amazon.com/TREND-AIR-PRO-Airshield-Faceshield/dp/B002Q0Y5IU/ref=pd_sbs_328_1?ie=UTF8&dpID=41zN23BMmUL&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&refRID=08YEMGY37YQZ8R22QERN I'm concerned about how effective either of these will be at filtering all the airborne gunk we expose ourselves to. The Airshield description says "The Trend airshield pro is designed to protect users from harmful dust particulates down to 0.3 micron size at a 98-Percent efficiency rate." The Powerflow description says "3M powered air purifying respirator helps provide respiratory protection against dust, mist, fumes, radionuclides and radon daughters. Lightweight and face-mounted, it uses a high efficiency particulate filter. US OSHA APF 1000 when used in accordance with 3M recommendations and user instructions." Now, the Powerflow description sounds like a fancy way of saying HEPA filter, and the APF 1000 rating as I understand it just means that it is a full-face PAPR, and doesn't actually speak to how much of the gunk is being filtered. I've tried looking for more info on these filters but 3M's website is frustrating me. Are these HEPA filters or are they something even fancier? According to OSHA (https://www.osha.gov/Publications/3352-APF-respirators.pdf), a HEPA filter is "A filter that is at least 99.97% efficient in removing monodisperse particles of 0.3 micrometers in diameter. The equivalent NIOSH 42 CFR 84 particulate filters are the N100, R100, and P100 filters". The Airshield filter sounds like it's nearly a HEPA filter, catching particles of the same 0.3 micron size, but not quite efficient enough to qualify. So how different are the filters really? What makes the Powerflow's filter suited for fumes and radionuclides, but the Airshield only suited for dust? And beyond that, can either of them protect against airborne particles that are smaller than 0.3 microns? Looks like both would protect well enough against metal dust from grinding, but what about smoke from a charcoal forge or "metallurgical fumes"? Most figures I see online dip down to 0.01 microns or smaller for some of this stuff. http://www.engineeringtoolbox.com/particle-sizes-d_934.html Particle Particle Size (microns) Anthrax 1 - 5 Antiperspirant 6 - 10 Asbestos 0.7 - 90 Atmospheric Dust 0.001 - 40 Auto and Car Emission 1 - 150 Bacteria 0.3 - 60 Beach Sand 100 - 10000 Bone Dust 3 - 300 Bromine 0.1 - 0.7 Burning Wood 0.2 - 3 Calcium Zinc Dust 0.7 - 20 Carbon Black Dust 0.2 - 10 Carbon Dioxide 0.00065 Cayenne Pepper 15 - 1000 Cement Dust 3 - 100 Clay 0.1 - 50 Coal Dust 1 - 100 Coal Flue Gas 0.08 - 0.2 Coffee 5 - 400 Combustion 0.01 - 0.1 Combustion-related - motor vehicles, wood burning, open burning, industrial processes up to 2.5 Copier Toner 0.5 - 15 Corn Starch 0.1 - 0.8 Dot (.) 615 Dust Mites 100 - 300 Eye of a Needle 1230 Face Powder 0.1 - 30 Fertilizer 10 - 1000 Fiberglass Insulation 1 - 1000 Fly Ash 1 - 1000 Gelatin 5 - 90 Ginger 25 - 40 Glass Wool 1000 Grain Dusts 5 - 1000 Ground Limestone 10 - 1000 Hair 5 - 200 Human Hair 40 - 300 Human Hair 60 - 600 Humidifier 0.9 - 3 Insecticide Dusts 0.5 - 10 Iron Dust 4 - 20 Lead 0.1 - 0.7 Lead Dust 2 Liquid Droplets 0.5 - 5 Metallurgical Dust 0.1 - 1000 Metallurgical Fumes 0.1 - 1000 Milled Flour, Milled Corn 1 - 100 Mist 70 - 350 Mold 3 - 12 Mold Spores 10 - 30 Mustard 6 - 10 Oil Smoke 0.03 - 1 One inch 25400 Oxygen 0.0005 Paint Pigments 0.1 - 5 Pesticides & Herbicides 0.001 Pollens 10 - 1000 Radioactive Fallout 0.1 - 10 Red Blood Cells 5 - 10 Rosin Smoke 0.01 - 1 Saw Dust 30 - 600 Sea Salt 0.035 - 0.5 Smoke from Natural Materials 0.01 - 0.1 Smoke from Synthetic Materials 1 - 50 Smoldering or Flaming Cooking Oil 0.03 - 0.9 Spanish Moss Pollen 150 - 750 Spider web 2 - 3 Spores 3 - 40 Starches 3 - 100 Sugars 0.0008 - 0.005 Talcum Dust 0.5 - 50 Tea Dust 8 - 300 Textile Dust 6 - 20 Textile Fibers 10 - 1000 Tobacco Smoke 0.01 - 4 Typical Atmospheric Dust 0.001 to 30 Viruses 0.005 - 0.3 Yeast Cells 1 - 50 http://capita.wustl.edu/CAPITA/CapitaReports/AerosolCourse/gif/Pcfig1.gif Is the only way to protect ourselves against these smaller particles to suck them out of the shop before they reach our noses? Do either of these respirators really protect us? Thanks guys
  3. Not certain if this contains every single runestone find, but it does contain translations of many of the earliest runic inscriptions, and the bibliography contains plenty of other good sources. Looijenga has done some of the more impressive modern work. Purchasing the whole book is expensive, like any academic textbook. Amazon has it: http://www.amazon.com/Texts-Contexts-Oldest-Inscriptions-Northern/dp/9004123962 You can also read it free here: http://www.academia.edu/5030830/Texts_and_Contexts_of_the_Oldest_Runic_Inscriptions An incredible resource is the University of Kiel's Runenprojekt database: http://www.runenprojekt.uni-kiel.de/abfragen/default_eng.htm I recommend using "4. chronology of inscriptions" to search by or in your case "7. inscriptions on a type of object" and then selecting "immobile Objekte" and then "Stein". That would show you only runestone inscriptions. Be sure to click the little "D" icon for each result to get the full info. Also a good but old resource is Wimmer's "Die Runenschrift" There is a German version for free here: https://archive.org/details/dierunenschrift00wimmuoft Haven't looked but you may be able to find an English version up for free as well. Hope that helps.
  4. Yeah!!! Jack reveals himself at last. Wonderful work man.
  5. Haha I love the title of your post. The knife is great, very good character. The walnut spacer looks like a band of patinated copper almost.
  6. Beautifully done Jeff, it's perfect. I love the detail work on the leather, you enhance the smallest details and it comes through in the overall impression.
  7. Beautiful! Ladies love a big beard haha
  8. Aw yeah this is going to be a great sword. Nice work man, really inspiring.
  9. Nice Chris! I love homemade tools and viking tools and homemade viking tools Looks like fun, enjoy them.
  10. Dude... Yes!!! This is looking so awesome. Wonderful photos of the process too, thank you.
  11. Those are my thoughts exactly Scott. I'm almost ready to try this strategy on my collaboration with Luke Shearer that I've been so late doing my part. Cast a blank, then take it down to desired shape. I'm pleased you're looking into this at more or less the same time. I will be watching for pointers
  12. Looks great Chris! I'd like to start playing with silver meself. That's so cool that it was a coin, did you forge it hot or annealed cold?
  13. "...where he stands, arms erect, gazing into the ether for around 45 minutes, or until his arms get tired..." baha
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