Wesley's band played at Clydefest today so we spent the day out with her and I didn't get a chance to photograph the kiln I unloaded at 7am this morning. I'll do it tomorrow because I have some nice things to show you. I worked on a very large house box yesterday that I am really excited about, although the roof part got too dry over night, guess I didn't wrap it as well as I thought and I broke it to bits today in a small fit I had. Oh well, I'll make another one.
In other news, yep I had lots of pinholes, I don't care, the forms are nice and the glazes are great so I am going to live with them and just tell people it costs extra to put in the pinholes! But the best part is I had a lightbulb moment after I unloaded and tried for the life of me to figure out what I was doing wrong. I have tried everything, my bisque is getting to be about 14 hours, lord! I soak the bisque at 1100 f, I sand the pots, wash the pots, the glaze was a commercial glaze, I soak the glaze fire near the end, used different clay bodies, blah blah blah...... and then I read this on digitalfire:
A very important factor to consider also is that modern industrial kilns supply a lot of airflow to the chamber and this carries away products of decomposition. If you are using a kiln without adequate ventilation then there may be not be enough oxygen available at the glaze surface to oxidize and carry away the carbon products of decomposition. Ventilation systems can be added to kilns but that does not mean they are adequate, the air may not be passing over all sections of the ware or at a great enough rate. Some industrial kilns have so much airflow that taller ware can actually blow over if it is not set correctly! If you are doing fast-fire this is critical, a fast fire kiln absolutely must have good air flow. If you are using an electric kiln without airflow, then expect glaze imperfections unless you are firing very slowly.
and that is when I realized there was one more thing that might be causing the problem. When I first got this kiln I had no pinholes at all. Then I went to a friend's house to see how they fired a reduction with the same kiln and I came home and cranked down the burner ports to 1/4 inch to allow for LESS OXYGEN! TADA, could this be my problem? Do you think that there is less ventilation going through the kiln? It seems that way to me, soooo, next firing I am opening those ports back to the way I had them and see if that does it, if not, I will be the famous pinhole potter haha!!!!