DIY glazes can do something commercial ones cannot:

Go on evenly, in one coat and dry in seconds.

Commercial brushing glazes are laced with CMC gum to make them paint on thin and dry slowly. Why would anyone want that? Layering. Brushing on layers takes time and it is difficult to get even coverage, but it justifies brushing up the prices also!

What if you are not a "layer slayer" and want the opposite of all of that: Go on thick enough at one go, dry in seconds and apply super even. DIY potters have that ability by making thixotropic dipping glazes. You cannot buy these because the gum kills thixotropy. Thixotropic glazes are fluid in the bucket but gel after a few seconds of standing. This enables really good dipping properties - the gelling enables the glaze to stay in place upon extraction from the bucket. This picture demonstrates how such glazes hang on to even a non-absorbent and wet surfaces.

Bottom: Extreme thixotropy. The spatula is held vertical by gelling only. Yet when this slurry is put in motion, it is fluid!
Top left and right: These spatulas were slowly extracted and the engobe and glaze just hang on in a perfectly even layer. On a bisque surface, the glaze dries quickly, within seconds. And the engobe hangs on to leather hard ware for perfect coverage, even around sharp contours.

Related Pictures

Layer slayers and jar junkies

AI generated picture and text to a prompt asking about the type of ware commonly made by potters and hobbyists who do layering of commercial bottled glazes (and some terms describing the trends).

This picture has its own page with more detail, click here to see it.

Commercial brushing glazes have made it possible for hobbyists to glaze pottery on the kitchen table. But, because of layering, recent years have seen them migrate into pottery studios and schools (even though DIY glazes are far less expensive and more flexible). There has also been a migration of emphasis from quality forming to surface treatment. Here is the kind of pots AI thinks we are making now:

"Brush 'n Buffs" rely on lots of brush-on glaze layers for visual effect rather than technical finesse in form or glazing.
"Gloss-Bosses" lean heavily on glossy, vibrant finishes to draw attention, often brushing up the prices to match.
"Glaze Blazers" blaze a trail through high-end glazes to make a statement piece without much focus on craftsmanship.
"Layer Slayers" layer glazes for that ‘artistic look’ rather than achieving mastery of the basics.
"Jar Junkies" depend on store-bought, premixed jars to give their work aesthetic appeal.
"Shelf Shockers" make pottery that looks striking on the shelf but might lack structural or functional finesse.
"Costly Coaters" coat basic pieces in costly glazes, inflating prices as if each layer adds value.
"Glitz Potters" put emphasis on glittery, glamorous finishes over solid craftsmanship.
"Kiln Thrillers" focus looks alone, with beginners banking on decorative glazes for appeal.
"Palette Pushers" pile on color layers as if painting rather than carefully curating glazes for effect.

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