|Monthly Tech-Tip |
Made from Tucker PHB (tested on our code L4183). Glaze is G3890 Arbuckle majolica recipe. Imagery done using Spectrum Majolica colors (the white tested under our code G3883). Glaze firing temperature is cone 05 (bisque cone 04). "I see medieval symbols as powerful images that we can use to talk about environmental activism today, women's rights today, just all kinds of political ideas about speaking truth to power," she says.
The mug on the left has three coats of Spectrum Majolica base, painted on by brush. Drying was required after doing the inside coats, so the total glazing time was several hours. The glaze layer is way too thin and it is not even at all! The one on the right was dipped in a 5 gallon bucket-full of G3890 Arbuckle white (that was weighed out according to a recipe and slurried at 1.62 specific gravity). It took seconds to dip-apply, the thickness coverage is good. As is obvious, it makes sense to make your own base white. Then decorate using the overglaze colors (e.g. the Spectrum Majolica series). Another advantage of making your own white is that you can splurge on the amount of opacifier (in this case 9% zircon and 4% tin oxide), to achieve maximum whiteness and opacity. And, you can proportion a mix of two frits (having higher and lower thermal expansion) to fine-tune the fit with the body (a big issue at low fire).
Majolica is white opaque glazed red earthenware clay having colored overglaze decoration. But if you know more about what it is technically you will have more control of your product.