Time for some much needed blog catch up. Just unloaded the kiln yesterday and have a little breather time.
This last firing I put some things in saggars with charcoal and fired. Had some very interesting results, including something I’d been aiming for (for a change). Noticed one strange thing: when I polished the rough surfaces with 240 wet sandpaper, I’d get these shiny spots. I thought that water was filling small holes which were created when the sandpaper broke off the surface of tiny bubbles in the glaze. This was actually happening, but when I looked at the surface through a loupe it became apparent that the shiny objects were small droplets of iron which filled the bubbles. I was actually able to remove one by prying it out carefully. Here are some pictures below.