Dance of the Crystals

For those not familiar with macrocrystaline glazes [there may be a few of you,I suppose]:the glaze is made up with far too much zinc [and not enough alumina to hold it together];it all melts at its top temperature,but,when held at a slightly lower temperature,the zinc starts to crystalize out of the still-runny glaze.Easy,right?
I've finished the firing cycle proper and am now at 1120,the upper edge of the crystalization band,aiming to drop down to 1116 and stay there for half an hour or so...