I've used commercial glazes, in my classroom, since I've started teaching. The majority of them are bottle glazes, with a couple I buy dry and mix with water.
Most of them work great, brush on very well, and keep a good consistency over time. However, there are a few that cause me some problems.
One of the more popular glazes gets pretty thick, and cracks as it dries. I used to just add water to thicker glazes, but as I learn more about glazes, I've discovered that it can make the problem worse.
Another issue, is with the glazes I mix. I follow mixing instructions, and the consistency seems great. Then I go to use them, and they don't brush well at all. They dry almost instantly, when applied, and like to settle in the container.
I've added Espom salt to address the settling, which helped somewhat. But I'm thinking of purchasing a couple other things, to see if I can improve things.
For the settling, bentonite seems to be advisable no? I would think a commercial glaze, would have enough in it, but who knows. I don't screen the glaze mixes, but thought about doing so. What size mesh would be best? I was also thinking of adding some type of gum, to improve the brushability.
In regards to the glazes thickening, I was going to try Darvan 7.
So my shopping list will be something like this:
80-100 mesh screen
Vee Gum, CMC Gum or a Gum solution
Large bag Peanut butter M&Ms
How's my list look?