Greenware,
Cleaning and greenware decoration
Greenware: Once the
piece is removed from the mold, it is left to dry. Drying
or "curing" time can range from 24 - 48 hours,
depending on the warmth of the room and the size of the
piece. The piece is now considered to be greenware or the
“raw” form of cast earthenware.
Cleaning:
Once the greenware has fully dried, there is a flashing
or seam caused by the mold that is then shaved off. Sanding
of the seams is the next part of the process. After sanding,
the dust is blown off with an air compressor. A mixture
of water and vinegar is applied with a soft sponge to
remove any excess dust and finger prints that may cause
“hot spots” on the piece. A ”hot spot”
is an area on the piece caused by oil and/or dust, where
glaze is repelled or will not adhere to the piece. This
must be carefully avoided at all times during the creation
of the piece.
Greenware Decoration:
Now that the piece has been properly cast and cleaned,
it must undergo the decoration and firing process. Under
glazing or “One Stroke” is applied to the
raw, set clay in the preparation of earthenware china.
This paint is actually comprised of colored clay that
has different techniques for application. It can be applied
as brush work out of the bottle (one coat for a translucent
look or two coats for opaque coverage.) When the paint
is diluted it can also be used as an antiquing medium.
This will will settle in to any inset design, enhancing
the detail of the piece. Brenda usually applies this paint
through an airbrush which is an altogether different technique.
An airbrush is a small, pen-like instrument that uses
air pressure to spray a fine, constant mist of liquid
or under glaze evenly onto the surface in question. The
piece, when coated, is then ready for the first firing.
For more information please visit the "First
Firing" link on the left.
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