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  • KellyW61 commented on icreatable's instructable How To Build A Floor For A House5 months ago
    How To Build A Floor For A House

    Total garbage is the way houses are built today. Use the cheapest materials to save a few bucks, charge more for the home, and pass the added maintenance on to the unsuspecting buyer. Nice job on the instructable - I'm sure it's not your fault home construction has reached this sad state.

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  • KellyW61 commented on triplephase's instructable DIY Thorn (and puncture)-resistant tyres12 months ago
    DIY Thorn (and puncture)-resistant tyres

    Kevlar is impact resistant not puncture resistant. This is proven by the fact that bulletproof Kevlar vests are not knife-resistant and they can be punctured by a knife just like any other cloth. To make Kevlar knife-resistant they add stiff hardened strands of wire woven into the fabric. This would not work for a bicycle tire because it needs to flex. Kevlar tire liners are mostly gimmick and work by adding distance from the tread to the tube, a couple mm at best, you would get the same results if they left out the Kevlar and just used a hard rubber liner, maybe even better.

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  • KellyW61 commented on andreyeurope's instructable How to grow great crystals1 year ago
    How to grow great crystals

    After reading some of the later posts I need to comment to my own post and say; Only use compounds that are safe to handle and store. I did a search and here is a link for "Safe enough" compounds. I'm assuming this means some level of caution is still necessary.http://chemistry.about.com/od/growingcrystals/a/Cr...

    While growing crystals like those in the author's examples is interesting (I used to do this when I was younger and had more free time) these crystals are very fragile. Growing most types of crystals that are durable and of use in jewelry etc. require very specific conditions. For example turquoise started as copper as it oxidized deep in the earth over millennia it was subjected to intense pressure and heat before it became what we call turquoise. The same is true for all of the gemstones or crystals we find attractive and durable enough for jewelry, etc. (My father was a gemologist and goldsmith who owned a jewelry store so I grew up being taught about this from a very young age.)Don't let that stop you from discovering some unique and beautiful gems you can grow in your own home thou...see more »While growing crystals like those in the author's examples is interesting (I used to do this when I was younger and had more free time) these crystals are very fragile. Growing most types of crystals that are durable and of use in jewelry etc. require very specific conditions. For example turquoise started as copper as it oxidized deep in the earth over millennia it was subjected to intense pressure and heat before it became what we call turquoise. The same is true for all of the gemstones or crystals we find attractive and durable enough for jewelry, etc. (My father was a gemologist and goldsmith who owned a jewelry store so I grew up being taught about this from a very young age.)Don't let that stop you from discovering some unique and beautiful gems you can grow in your own home though. Store them in covered plastic or glass containers though as I discovered years ago once grown some of these can break down and start to dissolve or decay just from the humidity in the air.Props to the original poster - growing crystals is a cool and interesting hobby and you can learn from the process while doing it.

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