Let me preface with I am fairly new and have only been throwing a few years and do not fire my own stuff. So its only a guess. The studio were I take classes, uses a gas kiln and I was thinking that color change and Crazing could have been caused by the reduction if the piece's was placed in a location of a draft?? My assumption is one of the reasons crazing happens is because a piece cools fast?
Thank you. I still have some practicing to do, because I am kind of a sticker about how lids fit. These are thrown as one piece and then cut and trimmed to make the lids.