I'm not sure thats a ever for me. That said I seem to get about 12-15 glazes going at any one time.-over time I experiment anbd bring is a new one to the fold and usuallt take one out.
Thats happend a few years ago with an iron saturated glaze I now make with synthectic iron and am phasing out the old iron glaze. The new one is much brighter and almost red in certain situations.
I have a few glazes that I have used my whole career and my costomers still crave them.
Test for me works in cycles of how bored I get with my glazes and how much spare time I have to adress the testing period.
I know for example I have big (last remodel of house) on our bedroom this late spring/summer and thats will take up all testing time so its now or fall for me for new colors.
as to the remodel its a full gut interior-raising the floor 11 inches to match rest of house as one level. Raising the ceiling at least 1 foot-That means collar ties and adding 2x6 to ceiling,making walls 2x6 over 2x4 as is currently by adding furring strips to studs.
Adding a very small 1/2 bath with wall monted Toto Toilet and a small corner sink. maple hardwood floor-moving closet into two closets. Moveing entry door 6 inchs over to fit closets .New windows(3 -3x6s) perment color outside wood interior. Maple trim throughout. New wiring (last room to get this).
Puting in a small mini split AC /heat pump unit for this room .(its about 16x 15 if I recall.)taking out the exterior door and filling in the 5/8 x 10 old growth redwood siding with cider siding(already have it)
Adding new insulation and 5/8 sheet rock as well.
I'm doing all the mechanical/electrical and helping with some wood work and doing the trim
This room was a add on in 1962 about 10 years before I boughtb the property and its all made from old growth redwood-and is currenty covered with mahogany paneling-the real stuff. Its that only room left thats not 5/8 sheet rock.
And as you may have guessed I'm not going to be making many pots during May 20th and the later part of June-But they are getting made NOW.
Sorry I got a wee bit sidetracked on the glaze question