Masking a Larger Area

[Ben xyz]

I am aware of attaching tape onto bisque surfaces before glazing, but I have a larger surface (4" circle) that needs to be masked. Is there such a thing as an adhesive sheet to try to accomplish this? What I'm going for is a lava glazed circle shape with another smoother glaze around it.
Not sure if brushing on the lava glaze (circle shape) first, then covering that shape with wax (before dipping)  would alter the behavior of the lava glaze at all when fired.

Thanks!

[Babs]

The wax will burn out way before the glaze starts to react to the heat process so should be good to go that way.

A small band where glazes overlap may be an interesting transition...

Let's know how it goes

 

[Rae Reich]

Contact Paper or peel-off labels. Labels come in various sizes and shapes as well as 8x10” uncut sheets that you can custom cut. Contact paper comes in a roll and is hard to keep flat for plates but curls nicely on cylinders. 

[Ben xyz]

Appreciate the tips, Babs and Rae. Had thought the wax would likely burn off pretty fast - just wanted to be sure  it wouldn't affect the weird nature of a lava glazes. I think I may have some contact paper around, along with a compass that will take small blades. Should be set to proceed. 

[Min]

Another product you can use is a latex resist. Brush 3 coats on the bisque where you want the lava glaze then when dry glaze the pot in your other glaze. Peel off the resist and brush your lava glaze on. (Michaels carries this brand and often have 40% off coupons)

 

[Ben xyz]

Thanks Min - will give a try! Great knowing about the stuff.

[Roberta12]

You can also use the same material people use for stencils that are cut with a die cutting machine.  Oracel 651 permanent  vinyl is one brand, or the Cricut permanent vinyl.  There are others.  It's not permanent on bisqueware.  It peels off but gives you a crisp area.  After you glaze or underglaze, then yes, wax that area .  Once it is dry peel off the vinyl.  The wax burns off and gives you a nice crisp area.  Many people report success with contact paper as well.