Increase the heat for 24 hours so that the furnace glows white-hot; the longer it stands, the better it becomes. Then, break open the crucible; the substance will be white glass, colored like milk. It should be ground and rubbed on marble with water until it is like milk or lead-white original: "Bleyweiß", a common white pigment in the 18th century. Afterward, one should make small vessels from white earth clay that can withstand fire and becomes entirely white, such as the clay from Tournai original: "Dornickische", referring to the city of Tournai, Belgium, famous for its clay which is reddish-grey but turns completely white when fired. These vessels should be made very thin on the potter’s wheel or bench and shaved; they can also be pressed into molds while they are still soft. Once they have become thin enough, they are thoroughly soaked with the previously described varnish The author uses "Firnuß" (varnish) to mean a liquid glaze and become completely translucent. However, where the vessels are thicker, one must work a sixth part of the glass-varnish or glaze into the clay itself. Likewise, the earthenware vessels must be "cooked" pre-fired or bisque-fired in a low fire before they are glazed, inside a protective casing a sagger, used to protect delicate ceramics in the kiln in which each small vessel stands enclosed on three feet or small points made of the same white earth. This casing must be made of Namur clay clay from the Namur region of modern Belgium, known for heat resistance and have all its joints well sealed. Once it has been cooked for 24 hours with a "dark glow" a low-heat firing, one should take the pots or vessels out, shave them as needed, and glaze them with the previously mentioned milk-powder mixed with water. This is done so that the water runs off, and the glaze should be as thick as half a Reichs-orth a quarter-thaler coin, approximately 1 millimeter thick to penetrate the vessels. When they are dry, one should paint them with enamel or blue pigment original: "Blau Ratzer" on the wheel or bench, in the manner of Chinese figures and vessels. As soon as they have dried again, they should be packed back into their casing as before and fired with the strongest possible wood fire; for the hotter the fire is, the whiter the vessels become.

A decorative woodcut tailpiece featuring symmetrical interlaced scrollwork and flourishes.

PHILALETHA ILLUSTRATED,

AN OPEN ENTRANCE

CLOSED PALACE

WITH A NEW PREFACE,

Joh. Michael Faust,