Skip to content
View in the app

A better way to browse. Learn more.
I Forge Iron

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

Stone age heat treating

urnesBeast
in Heat Treating, general discussion

Featured Replies

Very interesting. I wish the headline didn't say that they "shaped" stone tools with fire. What the author means is that they used fire to make stone easier to shape. Much like annealing steel, really. Modern knappers sometimes do the same thing with tougher rocks. There's an old myth that American Indians made tools by dripping water onto hot stone, causing flakes to spall off. Pure hogwash. The headline kinda plays into that.

  • Quote

    Matt's right. You can go to any knap-in (like a stone-age hammer-in) and find all kinds of heat treated stone for sale and trade.

  • Quote

    • Join the conversation

    You can post now and register later. If you have an account, sign in now to post with your account.

    Guest
    Reply to this topic...
    Go to topic listing

    Account

    Navigation

    Search

    Search

    Configure browser push notifications
    Chrome (Android)
    1. Tap the lock icon next to the address bar.
    2. Tap Permissions → Notifications.
    3. Adjust your preference.
    Chrome (Desktop)
    1. Click the padlock icon in the address bar.
    2. Select Site settings.
    3. Find Notifications and adjust your preference.