My first arrowhead...

Discussion in 'Other Skills' started by OMRebel, Aug 2, 2017.

  1. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    I have some blue bottles. Was saving them till I got some practice in.
     
  2. Seeker

    Seeker Woods Bum Supporter Bushclass I

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    I happen to have one... will bring it to work today.
     
  3. Hoof

    Hoof Guide

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    @OMRebel
    Sorry it took me so long to get back to you about my notching tool, it took me days to get a chance to run out to my place.

    This is my basic travel kit :
    20170808_132847.jpg

    And a couple of close-ups of the notching tool:
    20170808_133221.jpg

    20170808_133101.jpg

    It is a nail hammered into a stick, pretty high tech stuff. Head cut off, hammered flat and cleaned up with a file.
    I hope I can clearly explain the technique: after your first notch flake, flake both corners of the notch. Flip the point over and repeat - center, corner, corner. Your notch will maintain it's width even when the stone or glass gets thicker toward the middle. Practice this on a few shards and you'll be surprised at how quick you can cut your rock in half.

    Let me know how it works for you.
     
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  4. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    Any certain type of nail? Common, etc? Thanks!
     
  5. PERRO

    PERRO Supporter Supporter

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    I was just watching a " You Tube Video " on the same process !!

    202 - Beginner Notching Flintknapping

     
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  6. ozarkhunter

    ozarkhunter Hobbyist Hobbyist

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    While I don't have the patience or time to try my hand at knapping, I have access to thousands of acres that are within a couple of miles of the Spiro Mound site in OK. Some of the finds there were/are amazing! This site was part of the Caddoan/Mississipian culture.

    https://en.wikipedia.org/wiki/Spiro_Mounds

    I have been noticing some large chunks of chert, or similar rocks in some drainage ditches on the properties. I have yet to see any worked material, but keeping my eye out as I am in the fields.
     
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  7. Hoof

    Hoof Guide

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    Any nail you have on hand will do.
     
  8. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    Great video, thanls for sharing!
     
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  9. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    Tonight's project: make the tools that make the points.

    On the way home I swung by the local home center and picked up a file and a few feet of 1/8" copper wire. When I got home I made these tools, one from a nail (as suggested by @Hoof ) and one from the copper wire. And I knapped put a quick point so I could test my new tools. Unfortunately, the point was way to small to use my nail notcher thingy. The smaller pressure flaker is pretty awesome. I should be able to get sharper points with it. I'm going to make another nail notcher with a smaller nail to use with smaller pieces. Any who, enough rambling...
    20170808_203410.jpg 20170808_203541.jpg
    Thanks to everyone for the good instructions!!
     
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  10. Hoof

    Hoof Guide

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    Looks good, I much prefer handmade tools.
    Another tip: raw copper wire can bend easily when knapping, but it's very easy to harden. Put one end in a vice and the other end in your drill chuck. Spin it on high speed until one end pops off BEWARE: the wire will be skin melting hot at this point.
    Now the strength of the copper will be greatly increased. And if you make your own boppers use old wheel weights, it's hardened lead and that makes a difference.
     
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  11. PERRO

    PERRO Supporter Supporter

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    Hey everyone,

    I was watching another " You Tube Video " on Tempering Flint/Chert, using an Electric Turkey Roaster.

    The below are the two " You Tube Videos " examples.

    The first one advised " Insulating " the lid, which made sense to me. But, he didn't use any Sand (BUFFER MATERIAL) .


    The Second video, recommended using sand.


    After watching several different videos, I sorted out the required supplies.

    I already had an " Electric Turkey Roaster " laying around, & can't remember the last time it was used.

    1. Play Sand - Buffer Material ( 50 lbs Bag: Washed & Screened ) $ 4.95
    https://www.lowes.com/pd/QUIKRETE-50-lbs-Play-Sand/3006085

    2. Lowes Plastic Bucket & lid ( Storing Sand/ Optional ?) $ 4.36

    3. Fiberglass Insulation ( 1. Roll ) $ 15.43.
    https://www.lowes.com/pd/Johns-Manv...-with-Sound-Barrier-15-in-W-x-32-ft-L/3032423

    Play Sand & Storage Bucket
    [​IMG]

    I dropped the packaged Sand bag, into Bucket.
    [​IMG]

    Fiberglass Insulations rolled out & cut to fit Turkey Roaster lid.
    [​IMG]

    There was " NO " Paperbacking used.
    [​IMG]

    Three folded layers, of Heavy Duty Aluminum Foil (I do lots of BBQing & always have some on hand).
    [​IMG]

    Aluminum foil, tightly tucked & folded over lid.
    [​IMG]

    [​IMG]


    " IF " , it works " GREAT ".. If not ??? Oh well,.. it didn't cost me toooo much $$
     
    Last edited: Aug 11, 2017
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  12. Jeffro

    Jeffro Scout Bushclass I

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    OMR, look for copper nails in the roofing supplies they are much harder than ground wire. Find a metal yard such as Metals 4 U and buy copper rod it is hardened already. Do not use electrical ground rods as they are only copper clad and have a steel core. We sometimes make boppers out of short pieces of copper rod from the metal yard and some all thread rod, be sure to use red Locktite on the all thread in the copper and epoxy on the all thread in the wooden handle
     
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  13. Jeffro

    Jeffro Scout Bushclass I

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    When you are pressure flaking work with your hands between your knees. Put your pressure flaker on the platform and push strait into the platform with the pressure flaker until you build the pressure up until you think the platform will crush. Then squeeze your knees together with quick pop to detach the flake. You should be driving those flakes to just past the middle of your piece. Once you master this and master the manipulation of the edge to work the whole edge as a single platform then you will be able to start parallell flaking and now you enter the word of paleo points.
     
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  14. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    Thanks for the video and showing your setup. Let us know how it works!!
     
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  15. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    I didn't think to look at the roofing nails. I did buy a thinner piece of copper wire so we'll see how that works. Good heads up on the grounding rods. I almost grabbed one but decided to wait.

    I'll work on using my legs to add pressure. Saw a guy on Youtube doing that but havent gotten use to it yet. Thanks for all the tips!
     
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  16. Kenneth

    Kenneth Tracker

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    What kind off meets are there in Texas?
     
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  17. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    I haven't been to a Texas meet, but I've heard they're pretty nice. Keep an eye on the local Texas group (here) and you will see when they announce a meet. I have met @saustin1967 and @Hammbone who are from Texas and they are top notch people. I've heard great things about @Jeffro and he has also been active on this thread and has been a great help. Maybe one of them will give you a holler and let you know what's in the works.
     
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  18. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    Didn't work long on this tonight, mainly because I'm getting a nasty blister and it was getting dark. I did work on making a preform. Didn't get it very thin, but then again, it's the best I've done with something that's not glass. Many thanks for all the great tips!
    20170809_200808[1].jpg 20170809_201035[1].jpg 20170809_201113[1].jpg
     
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  19. Hammbone

    Hammbone Supporter Supporter Bushclass I

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    Hey Kenneth! @saustin1967 is the man with the plan for the Texas meets. Haven't seen anything coming up, but keep an eye on the Texas section of the BCUSA board and you might want to visit www.forum.txbushcraft.com. He posts upcoming event in both places.

    I'm definitely ready for a little dirt time. . .maybe when it cools off a bit.
     
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  20. Seeker

    Seeker Woods Bum Supporter Bushclass I

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    I think they raise beef mostly... sometimes I see venison, pork, chicken, and armadillo.



    Seriously, the east tx/houston area is pretty active... just look for stuff in the texas subforum.
     
  21. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    :35: nice...
     
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  22. PERRO

    PERRO Supporter Supporter

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    Just received a " Care Package " in todays mail :3:
    [​IMG]

    I have high hopes of turning a few, into something resembling the below " Arrowhead & Darts ", that I had previously purchased & will use as examples :33:
    [​IMG]

    I'll be trying out the " Heat Treating " process, using a Turkey Roaster, within the next few days :34:

    Thanks for the " Box of Chert " SVH.
     
    Last edited: Aug 11, 2017
  23. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    Looking forward to seeing your progress, as well as the heat treating results!
     
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  24. PERRO

    PERRO Supporter Supporter

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    Okay .. Here we go !!

    I was going to start the "Heat Treating " process tomorrow morning .. :33:

    However, I'm retired & don't get going ( Unless I'm going Fishing ) until about 0900 hrs, and fully awake & functional @ about 1000 hrs. It's summer & the local temperature have been " Triple Digits " in the daylight hours.. :11:

    So, I decided to setup the " Turkey Roaster " , while its a bit cooler @ NIGHT ( approx 2150 hrs ) :cool:
    [​IMG]

    First layer of Play Sand & Chert.
    [​IMG]
    I immediately noticed the Play Sand was very Damp. So, I'll add a few extra hours to the drying process ( 200 degrees ), before moving on to the higher Heat Treatment ( 400-450 degrees ).

    Second layer of Sand & Chert layered on top.
    [​IMG]

    Third & last few smaller pieces layered out.
    [​IMG]

    I used approx 3/4 of the " 50 lbs " bag of sand (Buffer Material).
    [​IMG]

    Sand packed down & lid placed on, temperature set @ 200 Degrees.
    [​IMG]

    [​IMG]

    [​IMG]


    An empty care package box :11:
    [​IMG]

    Since the Sand ( Buffer Material ) was damp, I'll let the Roaster run for approx 48 hrs !
     
    Last edited: Aug 11, 2017
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  25. weltondl

    weltondl Sergeant of Marines Supporter

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    I can't wait to see these when they're done. Will it Change the color?
     
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  26. PERRO

    PERRO Supporter Supporter

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    I'm completely new at this, & don't think the color will change @ this low temperature setting ( 400-450 )....?

    However, the stone should be a bit more brittle,.. making it easier to work with, based on my researched info.

    I.E: Reference Info

    HEAT TREATING KNAPPABLE STONE

    Ancient knappers discovered that the flaking characteristics of many types of stone could be improved by applying heat in a controlled manner. Some types of stone also can be flaked more readily by soaking the stone in water for extended periods of time. Personally, I've had poor success with the soaking option. Therefore, this book addresses only heat treatment for making rock more "chippy." The descriptions of stone types presented later in this book provide general guidance on heat treatment for various kinds of rock that are commonly used by modern knappers.

    WHY COOK YOUR ROCK?

    Heat treatment has its advantages and disadvantages. On the plus side, with proper treatment the stone becomes more brittle, the flake scars get smoother and glossier, it becomes easier to remove large flakes from a core, and pleasing color changes occur in some rock types. A smooth flake surface also allows for creation of a very refined point with exquisite notching and serrations. On the other hand, the increased brittleness induced by heat treatment reduces the durability and strength of the treated stone, making it easier to break a tool in manufacture or to dull its edge with use.

    Although heat treatment has been practiced for thousands of years, many prehistoric stone tools were fashioned out of untreated (raw) rock, even though the rock itself could have been heat-treated. Apparently, many ancient knappers did not want to sacrifice tool durability in exchange for ease of manufacture..........."

    http://www.pugetsoundknappers.com/how_to/Heat Treating Guide with Table.html
     
    Last edited: Aug 11, 2017
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  27. weltondl

    weltondl Sergeant of Marines Supporter

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    Very interesting. I have seen some flint that was heat treated and the colors were beautiful. I've done like 5 points now. It is frustrating to have one almost finished and it shattered when notching it! Good luck!
     
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  28. PERRO

    PERRO Supporter Supporter

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    Heat Treating Update:

    I checked the temperature last night before going to bed ( 2300 hrs ), to make sure the dial indicator ( Thermostat ) was close to an actual reading.

    I noticed a few wet spots in the Sand, along with the bottom of the lid slightly damp. My conclusions were,.. the moisture & condensation was steaming onto the bottom of the Aluminum foil lid, & dripping back onto the sand.
    [​IMG]

    Temperature readings.
    [​IMG]
    171: Near the edge.

    [​IMG]
    138: Closer to the center

    Next morning 0700 hrs: ( I was up early :11: ).
    [​IMG]

    Another damp/wet spot in the Sand.
    [​IMG]

    Temperature readings.
    [​IMG]
    248 : Near the Edge.

    [​IMG]
    206 : Near the Middle.

    Due to the higher than anticipated temperature readings,, I decided to lower the thermostat, to avoid any potential damages to the Chert @ this point.

    PS: I just checked the " Accuracy " of my Digital Thermometer, Boiling water @ Sea Level: 212 F.

    EDIT: Techie Info


    Temperatures of Water:

    Approximate Boiling Temperatures of Water


    Altitude – Temperature

    Sea Level – 212 degrees F. – 100 degrees C.

    1,000 ft. – 210.2 degrees F. – 99.00 degrees C.

    2,000 ft. – 208.5 degrees F. – 98.06 degrees C.

    3,000 ft. – 206.7 degrees F. – 97.06 degrees C.

    5,000 ft. – 203.2 degrees F. – 95.11 degrees C.

    7,500 ft. – 198.9 degrees F. – 92.72 degrees C.

    10,000 ft. – 194.7 degrees F. -90.39 degrees C.

    15,000 ft. -185.0 degrees F. – 85.00 degrees C.

    https://whatscookingamerica.net/boilpoint.htm

    Digital Thermometer Accuracy Test : Pot on Stove & water Rolling Boil.
    [​IMG]
    My location: Altitude; 2,655

    Temperatures of Water:


    Approximate Boiling Temperatures of Water


    Altitude – Temperature

    Sea Level – 212 degrees F. – 100 degrees C.

    1,000 ft. – 210.2 degrees F. – 99.00 degrees C.

    2,000 ft. – 208.5 degrees F. – 98.06 degrees C.

    (** 2,655 ft ** - 207 degrees F ) :33:

    3,000 ft. – 206.7 degrees F. – 97.06 degrees C.

    5,000 ft. – 203.2 degrees F. – 95.11 degrees C.

    7,500 ft. – 198.9 degrees F. – 92.72 degrees C.

    10,000 ft. – 194.7 degrees F. -90.39 degrees C.

    15,000 ft. -185.0 degrees F. – 85.00 degrees C.

    Hmmm,.. My " Thermoworks Digital Thermometer ", is pretty accurate :3:
    http://www.thermoworks.com

     
    Last edited: Aug 11, 2017
  29. saustin1967

    saustin1967 Supporter Supporter Bushclass I

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    First rule of Fight Club?
     
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  30. CivilizationDropout

    CivilizationDropout -MOA #17-MYOG #71- Supporter Bushcraft Friend

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    Our QA department tells me I have to calibrate my thermopen all the time, I'm tired of explaining that you verify a thermopen, NOT calibrate...
     
  31. PERRO

    PERRO Supporter Supporter

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    24 Hour Update:

    Play Sand appears to be completely dry & hot to the touch.
    [​IMG]

    214 F edge of Rim Temperature.
    [​IMG]

    210 F middle Temperature.
    [​IMG]

    175 F Thermostat setting.
    [​IMG]

    HMMM, educated guess.. The insulated lid might have led to an increase in temperatures ?? I might get over 500 F + Temps ?

    I'm going to crank the heat up ( 450 F ) tomorrow @ approx 1200 hrs, for an additional four hours. And then let it cool down for 24 hrs.
     
    Last edited: Aug 12, 2017
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  32. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    Got it @svh , thanks! Thought the mail man was gonna throw his back out, lol! Lots of good looking stuff in there.

    @PERRO has been showing how to use a turker roaster to heat treat the chert. Anyonenow of an alternate way (oven)?
    20170812_124613.jpg
    Popped off a decent flake right off the bat so I made this little arrowhead
    20170812_134619.jpg
    I've got a ways to go, but I think this could do the deed.
     
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  33. PERRO

    PERRO Supporter Supporter

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    FYI: The below link describes several different methods of " Heat Treating ".

    ".......Some people treat stone in their kitchen using the family oven. This is bound to win the cheerful support of interested spouses, particularly when the rock starts giving off stinky odors or popping off spalls from over-cooking! Second-hand ranges can be purchased quite inexpensively by the dedicated knapper. Although this method of heat treatment is feasible, typical kitchen ovens only attain a maximum temperature of about 500-550°F. And long cooking times in the family range can use a lot of electricity!

    Another popular device for cooking stone is an electric turkey roaster. If you can find them, electric turkey roasters are fairly affordable (particularly at second-hand stores or garage sales). They can also hold quite a bit of rock at one time and the heat can be controlled with a dial gage. But the maximum temperature attainable for most turkey roasters is about 450-500°F. This is good for some types of rock, but other types of stone need more heat..........."
    http://www.pugetsoundknappers.com/how_to/Heat Treating Guide with Table.html

    Hmmm, ...A small Kitchen Countertop Electric Oven ..Might also work??
    https://www.walmart.com/search/?query=Counter Top Electric Oven
     
  34. Paul Foreman

    Paul Foreman Supporter Supporter

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    sure do appreciate this thread ...
     
  35. PERRO

    PERRO Supporter Supporter

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    1200 Hrs Update:

    I cranked the heat ( 300 F ) up a bit early ( 1100 hrs ) , to slowly bring up the heat.
    [​IMG]

    And to " Verify " the Temps.
    [​IMG]

    I moved up the thermostat @ 1200 hrs to " 450 F ".
    [​IMG]

    Additional Techie Info:

    The Thermopen info, copied from Thermoworks Website :
    Accuracy : ±0.7°F (±0.4°C) from -58 to 392°F (-49.9 to 199.9°C), ±1.8°F (±1.0°C) from 392 to 572°F (200 to 299.9°C).

    If it gets hotter than " 572 F " ?? .. I'll have try using another Thermometer, with a higher Temp rating, which I haven't used yet :30:
    ( Christmas Gift: Me to ME :14: ).

    [​IMG]
    Boiling Water Temperature Accuracy " Test / Verification ": 206.8 F

    [​IMG]
    http://www.thermoworks.com/IRK-2
     
    Last edited: Aug 13, 2017
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  36. PERRO

    PERRO Supporter Supporter

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    Update: 4 hours Heat Treatment:

    I didn't want to remove the cover @ this point ( per one of the You Tube Vid's Instruction.. NOT TO DO ) . However, ..I needed to know for sure..What the actual temperatures were ??

    I already knew, the center would be cooler than the outer edges. So, I only tested the outer edges @ different depths, on both ends of the Turkey Roaster.

    [​IMG]
    462 F


    [​IMG]
    548 F : Hmmm, Hotter on the top portion .. Heat Rises ? :45:

    Turkey Roaster unplugged & covered with a " Linen Drop Cloth " for a slow 24 hour cool down.

    [​IMG]

    [​IMG]

    I'll post some additional photos of the cooked Chert, within the next day or two. :3:
     
    Last edited: Aug 12, 2017
  37. PERRO

    PERRO Supporter Supporter

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    24 Hour Cool Down results:

    Top layer of Chert was still very warm to the touch.
    [​IMG]
    They were all of the smaller pieces, which Ill try to work with first.

    [​IMG]
    There does seem to be some noticeable color changes ( Slightly Red Coloring ) :6:

    Second layer.
    [​IMG]

    This piece was in the lower left hand corner, ( High Heat ) and appears to have cracked off a few pieces. There were no others that fractured or cracked.
    [​IMG]

    A few more pieces of the second layer of Chert,
    [​IMG]

    Third & last layer
    [​IMG]

    [​IMG]

    [​IMG]

    In the future, I'll only cook two layer batches, & also try to keep the Rocks /Cherts, approx the same sizes for Heat Treating consistency.
     
    Last edited: Aug 13, 2017
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  38. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    @PERRO I can't wait to see how well the flake. Did you keep some untreated to test with the treated ones? I'd like to know how different they are.
     
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  39. PERRO

    PERRO Supporter Supporter

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    I have never tried to " Knapp " anything so far ..And couldn't tell what was better or worse.. :30:

    I didn't think to save any, unheated pieces for a comparison.

    I'm also saving a few " Glass Bottles " with flat sides.
    [​IMG]
     
    Last edited: Aug 13, 2017
  40. Jeffro

    Jeffro Scout Bushclass I

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    I knew a man lived in Joplin Missouri who would treat his flint by burying preforms in a sandpit and building a charcoal fire on top of the buried flint. He would come back a few days later and dig up treasure. He felt that this is the way the ancients did it without too much science and he wasrather ssuccessful at it.
     
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  41. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    Here's an older thread where someone posted a video doing it that way.
    https://bushcraftusa.com/forum/threads/processing-some-utah-chert.176648/
     
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  42. svh

    svh Supporter Supporter

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    As you have seen, they do change color. Most notably they turn a pink, and or darken up a bit.

    I do crude heat treats in a fire pit with a sand base, at least a 3 - 4 inches deep. Then I'll layer similar sized spalls on top of base, and cover with about 2 knuckles deep of sand, build a nice fire on top, takin care to spread the fire to the edges of the pit, as it grows to not heat the middle too much. I usually burn for about 4 - 5 hours, then let cool for around 48 hours. I've had mixed results, and this winter I will try to refine the process.
     
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  43. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    NOOOooooooo......

    20170816_203225.jpg
     
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  44. CivilizationDropout

    CivilizationDropout -MOA #17-MYOG #71- Supporter Bushcraft Friend

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    DAMMMMMM.

    Wow, wow man that SUCKS.

    Salvage, make it into a hoko?
     
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  45. Hoof

    Hoof Guide

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    Well, I'm glad that has never happened to me ;)
     
  46. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    It was going so well, but I should've went down to my thinner flaker. I expect to break many more on the path to primitive awesomeness, lol
     
  47. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    @PERRO how did that chert come out?
     
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  48. PERRO

    PERRO Supporter Supporter

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    Its been a bit too hot ( Triple Digits ) to sit outside & do anything for any length of time. I also don't like having sweat rolling down off my eyeglasses & can't see anything I'm doing.

    An older couple were out hiking a few days ago, not tooo far from my location. They were both found unconscious & had expired, due to the excessive heat & not enough water.

    In the meantime,.. I've been reviewing " LOTS " of You tube example of Knapping, before I try my hand at it !!
     
  49. PERRO

    PERRO Supporter Supporter

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    I've also been getting together my gear ( pending available Funds $$ ).. , which I'll be using.

    I wanted to keep my " Knapping Gear " somewhat organized. Or , I lose track of where its been last seen & stored :11:

    Wally Mart Storage Box.
    [​IMG]

    Wally Mart Closeout Storage Bag.
    [​IMG]

    New - Harbor Freight Fiberglass Welding Blanket, to insulate the " Turkey Roaster " in the future.
    [​IMG]

    Knapping Jig ( E-Bay Purchase) & misc Knapping Tools.
    1) JTS JIG
    1) 12" DERLIN ROD ISHI STICK FLAKER W/ 20D COPPER INSERT
    1) DERLIN ROD HAND FLAKER W/16D COPPER INSERT
    1) DERLIN ROD HORSESHOE NAIL NOTCHER
    1) ABRADER STONE
    1) LEATHER HAND PAD
    1) EXTRA 16D COPPER INSERT FOR ISHI STICK OR HAND FLAKER
    1) EXTRA 6D COPPER INSERT FOR THE NOTCHER.
    [​IMG]

    Tool Box with Flaking Sticks ( Copper & Steel ) Extra Tips, etc.
    [​IMG]

    Knapping Jig & Pads, Gloves.
    [​IMG]
    Stole the Rib bone from my Dogs :27:

    My box of Chert waiting to be Flaked.
    [​IMG]

    Misc Rocks, I picked up to use as possible Hammer stones ??
    [​IMG]

    I'll mention the below, simply due to how the above started.. I was going to initially try to use the Angle Grinder, to shape a " Stone " into an " Axe Head ". :30:

    Mikita 4 1/2 SJSII Angle Grinder, & Accessories wheels : Masonry Cutting Wheels & Grinding Attachments / Wire Brushes.
    [​IMG]

    I'm just waiting for COOLER weather, to begin Tinkering with Knapping :33:
     
    Last edited: Aug 17, 2017 at 3:48 PM
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  50. OMRebel

    OMRebel Scout Bushclass I Bushclass II

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    Wowsers, that's quite a set up!! Make sure to have the safety glasses handy.

    I'd love to hear more about that knapping jig in picture 6.
     
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