help with slabbed material

A collection of information for those just starting their flintknapping journey.

help with slabbed material

newknapper
Registered User
Joined: 11 Feb 2006, 21:41

25 Mar 2006, 13:33 #1

this is the first time trying any of this and i dont know where to go from here or how do i get the flat spot from the middle and edge of my stone? do i remove the deltas and make another pass or what? here is the best picture i could get.




Reply

Flyfsh
Registered User
Joined: 22 Mar 2005, 22:00

25 Mar 2006, 16:35 #2

At this point in the piece your best bet it to crush the edges to raise the plaform and make another pass. Large slabs that are thin are tuff for me to flake all the way across. I usually take my initial flakes a little shallower and space them farther appart. from the picture it looks like only 1 side you have made a passon. The hinges in the middle will give you a bit of trouble. You can make a tool from copper rod with a flat (screwdriver) type point on it. Use it to place against the hinges and carefully strike the end of the tool. This will sometimes help to remove the middle where your flakes did not go all the way across. If any of this is clear as mud holler and I can try to explain better.
Jim
Reply

Idaho Clovisman
Registered User
Joined: 07 Mar 2006, 14:58

25 Mar 2006, 17:52 #3

By knapping off the flat edge of the slab you are setting yourself up for trouble .instead first take a small flake from one corner then turn the slab over and take a small flake from the low spot left from the 1st flake (do not try to knap accross the surface of the slab) flakes do not run very well on a flat surface first you must build convexity. now back to the slab continue around the whole slab alternating small flakes from one side to the other and you will see a zig zag patteren emerging around your slab this is what you want.

now you have a zig zag pattern look at your slab some of the zigs will be low and some will be high go around the slab again taking only small flakes mabye 1/4 inch and take all the low platforms on one side then turn it over and take all the lows from the other side .NOW you have a slab that has a straight working edge all the way around it.

Now you can take a pass on each quarter, of flakes about 1 inch long this will build the convexity we want now the flakes will start traveling a little farther because the slab is now getting rounder in the middle and if you follow this procedure you will get rid of all the saw marks just be patient...

if you need any help or pictures let me know...MikeIf God did Not want us to eat animals why did he make them out of meat?
We have learned that though there are many papers in Washington upon which are written promises to pay us for our lands,no white man seems to remember them.

Four Guns.
Reply

PaleoAleo
Registered User
Joined: 14 Apr 2003, 21:09

25 Mar 2006, 18:31 #4

Just what I was going to say (but Mike said it so much better than I ever could!).

Pushing flakes off a square edge is certainly possible, but it will usually cause exactly the problem that you are experiencing.

Charlie made a drawing/diagram of what Mike is describing. It might be in the Flintknapping Resource Area. If not, I'll see if I can find it, as a photo/drawing is worth a 1000 words.

Tom
Reply

Idaho Clovisman
Registered User
Joined: 07 Mar 2006, 14:58

25 Mar 2006, 21:17 #5

thanks tom...i hope he can understand it a picture would be great.. If God did Not want us to eat animals why did he make them out of meat?
We have learned that though there are many papers in Washington upon which are written promises to pay us for our lands,no white man seems to remember them.

Four Guns.
Reply

newknapper
Registered User
Joined: 11 Feb 2006, 21:41

26 Mar 2006, 00:24 #6

maybe a picture would help a little
Reply

Idaho Clovisman
Registered User
Joined: 07 Mar 2006, 14:58

26 Mar 2006, 02:19 #7

ok i will go out and turn the edge on a slab and post a picture..give me a few min..hope this helps now once you tell me you got this part i will show you the same slab set up for a complete pass..



Figure 1


Figure 2


Figure 3


Figure 4


Figure 5a


Figure 5


Figure 6


Figure 7


Figure 8


Figure 9


Figure 10


Figure 11


Figure 12


Figure 13
We have learned that though there are many papers in Washington upon which are written promises to pay us for our lands,no white man seems to remember them.

Four Guns.
Reply

Chips Rock2.paleoplanet69529
Registered User
Joined: 27 Sep 2005, 12:13

26 Mar 2006, 04:54 #8

Just how wide is that slab? There are occassions when I get a real large slab, I cut it into several pieces on a tile cutter. If it is 3 inches or wider, I think that might be a bit much for someone new. ICM gave you some real good advice. The only thing I differ with is that on glass and obsidian you can knap off of a square edge and I do it maybe 30 percent of the time. If you follow ICM's advice, I think you will be pleased with the results. There are a bunch of problems associated with knapping off of a square edge, if you turn the edge like ICM shows in his pictures, you are going to note a big diffferance.
Reply

Idaho Clovisman
Registered User
Joined: 07 Mar 2006, 14:58

26 Mar 2006, 06:07 #9

It is true that you can knap off the square edge but at some point you will have to build convexity into your slab or it will be flat as a pancake ...obsidian is very easy to pressure flake as is glass the method i have described was taught to me by Craig Ratzat and he is a obsidian knapping guru on slabs lol so either way have fun with it and remember once you get the idea you can adapt any of these or other ways to your way of knapping ,there is no one way there are many many right ways .. If God did Not want us to eat animals why did he make them out of meat?
We have learned that though there are many papers in Washington upon which are written promises to pay us for our lands,no white man seems to remember them.

Four Guns.
Reply

newknapper
Registered User
Joined: 11 Feb 2006, 21:41

26 Mar 2006, 16:34 #10

very informative it helps a ton to be able to ask stuff like that when you dont have a clue how to d something and it saves material too. thanks everyone. when i get through i will post what the finished product looks like.
Reply

ber643
Registered User
Joined: 28 Jan 2006, 09:08

27 Mar 2006, 13:12 #11

Great instructive teutorial! A keeper for sure.
(You should have a book out, ICm - I mean it!)Bernie - "Hunters Are People Too"
Reply

Guest
Posts 0
Guest

28 Mar 2006, 00:24 #12

Cool! I'm ready for the next step.....
Thanks!
Pickle
Reply

Idaho Clovisman
Registered User
Joined: 07 Mar 2006, 14:58

28 Mar 2006, 01:09 #13

ok i will work on the slab and post the pics tomorrow so the zig zagging went ok ??If God did Not want us to eat animals why did he make them out of meat?
We have learned that though there are many papers in Washington upon which are written promises to pay us for our lands,no white man seems to remember them.

Four Guns.
Reply

Guest
Posts 0
Guest

28 Mar 2006, 03:19 #14

For me, yes. I've always been able to zig-zag the square edge of a slab, but I don't seem to be able to get flakes longer than 1/4 inch once I start to try the pressure flaking. Newknapper's flakes are much longer than any I've been able to achieve. If I could get that far, I know that by shaping it to lensic in nature, I'd be able to wipe out the sawn surfaces as I progressed from flat to lensic.
Could be my arthritus has stolen too much strentgh, could be I just don't know how to work a slab. Could be I expect more than I should at that stage. Dunno. Don't have any knappers near me to ask for help, so your step by step is very welcome. Hopefully, it'll help me get past those 1/4 inch flakes. Thanks!
I can percussion an abo looking point from a spall or flake, but pressure flaking (or even percussion flaking) a slab? No joy in Muddville.

Thanks again!
Pickle
Reply

Idaho Clovisman
Registered User
Joined: 07 Mar 2006, 14:58

28 Mar 2006, 03:39 #15

if you could explain a bit to me about how you use your presure flaker and the way you sit and hold the piece..that would help alot...If God did Not want us to eat animals why did he make them out of meat?
We have learned that though there are many papers in Washington upon which are written promises to pay us for our lands,no white man seems to remember them.

Four Guns.
Reply

newknapper
Registered User
Joined: 11 Feb 2006, 21:41

29 Mar 2006, 00:56 #16

ICM what you showed us was a great help. i broke the obsidian piece but i had one more piece of something else so i made my flaking passes and done the zig zag like you showed cleaned up the edges an this is what i got.



the black one was a flake of dacite i had just threw it in there for the heck of it
Reply

Guest
Posts 0
Guest

29 Mar 2006, 03:16 #17

Thanks!
Lets see if I can explain it good enough.
I hold the slab in my left hand, encased in a piece of leather, between my legs or sometimes on my leg or a table top. I place the tip of my flaker (antler tine or copper tip, doesn't matter - I get the same results) in the opposite side of the delta (the cupped area) and try to push the ridge off, pushing towards my palm.
Thanks again!
Pickle
Reply

Idaho Clovisman
Registered User
Joined: 07 Mar 2006, 14:58

29 Mar 2006, 05:10 #18

Newknapper man that is awesome..great job you are for sure getting the hang of it...now make another..

Picklefoot that sounds about right ,do you have trouble seeing the platforms with the slab incased in leather??? if so try to just have a hand pad for your left hand hold the slab with your finger tips against the hand pad and flake off towards your hand ..use your legs bt squeezing them together and you will generate alot more power...i will get the next part of this thing up by tomorrow .. If God did Not want us to eat animals why did he make them out of meat?
We have learned that though there are many papers in Washington upon which are written promises to pay us for our lands,no white man seems to remember them.

Four Guns.
Reply

newknapper
Registered User
Joined: 11 Feb 2006, 21:41

29 Mar 2006, 14:44 #19

i will as soon as i have more material but i got more on the way.
Reply

Wild Ed
Registered User
Joined: 28 Mar 2006, 01:02

29 Mar 2006, 17:08 #20

I am having a problem getting flakes to run far enough across the slabs to end up with a clean face. Here my first 4 points, I broke some of the slabs of obsidian so some are smaller. Any help running longer flakes would be appreciated. Thanks, Ed Thomas
[/img]
[/img]
Make time for the important things in life.

http://wildedtx.blogspot.com/
Reply