Getting the sagger smoke better now. I was getting either no smoke in the crackle or to black. Seems better now. Have worked out that by opening the sagger when still very hot i can alter the effect by re oxidizing or adding more saw dust to the bottom of the sagger.
One of my latest pots. After smoking in a sagger to 600 deg c. I got the crackle effect to stand out a bit more. Had to open the sagger to re-oxidize a bit as it was to dark. Re-oxidized at 400 deg c.
This is the oil spot cone 6 glaze that is listed in my glaze page. It is a two part glaze with an iron glaze going under the white glaze. Many variations of this glaze can be made by changing the oxides and the quantities of the top cover glaze . Here these pieces were fired twice as the soak time worked out to be to short to produce the oil spot first time around , and as you see i got an oil spot glaze on speed!!! This glaze seems to give different results with any change in the firing cycle and even from kiln to kiln. So keep a note of your ramp up times and your soak times !!
Here are some pics of a glaze i worked on this year. A cone six electric fired iron and ash glaze. A black oxide pigment mix was sprayed on at an angle to pick up the high spots.