Speedball Underglaze, Black, 16 oz, Made in USA, Lead-Free Color Glaze for Pottery and Ceramics, Wide Firing Range Cone 05-10, Food Safe

I did not get a chance to use the product as the lid was open and product dried out. It cost me $27 to ship it back. I am not happy with my expense and a non usable product. I have a photo I saved but can't submit. It shows the the condition of the package.

The product was separated and gloppy, no option to get a replacement!

Here’s a short, personalized review you can use: ⸻ I’ve been using the Speedball White Underglaze on my pottery pieces, and it’s been a great addition to my studio. Once I gave it a good stir and thinned it slightly, it brushed on beautifully—smooth and opaque in just two to three coats. I love using it for sgraffito and surface designs where I want crisp, clean lines, and it fires to a nice bright white under clear glaze. It holds up well through bisque and glaze firings, even at Cone 6. Definitely a solid staple for any potter looking to add reliable white detailing to their work. The only concern that I feel obligated to state about this product is that if you’re going to apply a clear glaze over it, you definitely should be using Speedball clear because it does not seem to like when I use another brand’s clear over it and will occasionally bubble or crack if I don’t use the Speed ball clear.. I called Speedball to ask them about this problem and they confirmed that this is a known issue.

Excelente producto, vino bien empaquetado y cumple con mis expectativas

I use underglazes almost exclusively because I want the control and options for detail that they provide. Most items are finished with food safe clear glaze. These underglazes are a little bit thicker consistency than the 2oz bottles, which is great because they can be watered down, meaning that they’ll go even farther. They’re opaque with 3+ coats, like most underglazes. Add a little more water and put some in a needle-nosed glue bottle (used for quilling) or tiny brushes to add fine details. Or pour 2+ colors onto a plastic bag, swirl, and place your piece on top for a marbled effect that will dazzle your admirers. My only wish is that the 6th bottle was green instead of orange.