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#1
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Is "Base Oxidation" "Freezer Burn"?
http://en.wikipedia.org/wiki/Freezer_burn
Seems that BNS and others are saying what they used to call base oxidation isn't that at all. Not sure if they state what they think it is, and some have theorized that it's not even a bad thing. Don't know why no one with access to a mass spectometer hasn't taken a look at that grey stuff's chemical composition and compare it to a scraping of shiny base, but in any event I wonder if base oxidation is caused by the same action as freezer burn. See above link. Gary Jacobson Rosendale, NY |
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#2
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Is "Base Oxidation" "Freezer Burn"?
Gary Jacobson wrote:
http://en.wikipedia.org/wiki/Freezer_burn Seems that BNS and others are saying what they used to call base oxidation isn't that at all. Not sure if they state what they think it is, and some have theorized that it's not even a bad thing. Don't know why no one with access to a mass spectometer hasn't taken a look at that grey stuff's chemical composition and compare it to a scraping of shiny base, but in any event I wonder if base oxidation is caused by the same action as freezer burn. See above link. Gary Jacobson Rosendale, NY Freezer burn is explosion/disruption/loss of moisture from a cell. Since white patches can occur on warm storage skis, I don't think the freezing part has anything to do with it. gr |
#3
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Is "Base Oxidation" "Freezer Burn"?
Don't know why no one with access to a mass spectometer hasn't taken a look at that grey stuff's chemical composition and compare it to a scraping of shiny base, but in any event I wonder if base oxidation is caused by the same action as freezer burn. See above link. Gary, I hear you. Scientific research in the area of surface chemistry of polypropylene ski bases is lacking. The myths/beliefs/facts about pores, base oxidation, wax soaking, wax retention, microstructure etc are all testable with a mass spec, optical/atomic_force/electron microscopy, etc. This equipment is quite pricey for basement type science (e.g. at least $100K for a decent atomic force microscope, but the realistic range is more like $500K). Due to the cost, the equipment is often shared between different labs (e.g. a department may have a shared mass spec) which means that usage time is often limited. Surface chemistry in general (not just of ski bases) is a tough field (“God created bulk but the Devil created surface” - by Fermi?) I am wondering why wax companies never publish semi-scientific proof of their claims (I've only seen semi-quantitative data on contact angles on wax packs). |
#4
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Is "Base Oxidation" "Freezer Burn"?
On Nov 30, 4:54*pm, Gary Jacobson wrote:
http://en.wikipedia.org/wiki/Freezer_burn Seems that BNS and others are saying what they used to call base oxidation isn't that at all. Not sure if they state what they think it is, and some have theorized that it's not even a bad thing. Don't know why no one with access to a mass spectometer hasn't taken a look at that grey stuff's chemical composition and compare it to a scraping of shiny base, but in any event I wonder if base oxidation is caused by the same action as freezer burn. See above link. Gary Jacobson Rosendale, NY Nathan Schultz & Zack Caldwall's Master Skier Pre-Season 2008 article "Stonegriding for speed" speaks to the question. They write: "People genearlly say that a base is 'oxidized', but those white spots on a ski are generally dry regions or abraded fibers of UHMWPE, not oxidized." The article notes that UHMWPE is sintered ultra-high molecular wt. polyethylene or P-tex. |
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