Blown glass The shaping of glass by blowing
air through a hollow rod into the center of a molten glass gather.
Cane Any string or rod of glass.
Cold shop A glassworking studio that
does not have furnace or glory hole (see Hot shop).
Cut glass Grinding stones that are worked
wet to cut designs onto glass.
Direct carvingGlass chunks may be carved,
ground, chiseled or otherwise shaped like other sculpture materials.
Enameled glass Opaque glass colors melted
onto glass surface. The colors are actually glass powders.
Engraving Design cut or scratched on
glass with diamond point, stone, metal or copper wheel. Usually
more complex and flexible than cut glass work.
Etching Glass may be etched by hydroflouric
acid, HF1, which likes silica. Dangerous.
Fire polish The reintroduction of an
object into the furnace in order to smooth an irregularity. A
technique used to retain a shiny surface to glass after it has
been ground on a grinder or sandblasted.
Flashing Very thin layer of colored glass
fired or vaporized on base glass.
Gather A ball of molten glass taken from
a pot or furnace on the end of a hollow blow rod.
Gilded Metals, such as gold, fired onto
Glory Hole A high-temperature chamber
used for reshaping glass either on a punty rod or blow pipe.
Hot shop A glassworking studio containing
a furnace and glory hole--especially a glass blowing studio.
Incalmo Joining two or more blown sections
Iridescence Thin laminated flakes of
glass showing decomposition with age. Also artificial, as done
Iridized glass Glass whose surface is
chemically treated to have a rainbow or iridescent appearance.
Kiln Insulated chamber for heating and
cooling glass or ceramics.
Kiln-formed Glass that is altered, fused,
shaped,or textured by the heat of a kiln.
Latticinio Threads of white or colored
glass within clear glass, sometimes lace-like in pattern.
Lamp work Any glass-working technique
done with the direct flame of a torch; work with pre-formed glass
rods and tubes.
Leaded glass Stained glass window held
in place by lead cames.
Lost wax casting The object is modeled
in wax and cased in a ceramic or plaster mold. The mold is heated
and the wax flows out; powdered or molten glass is poured into
Millefiori The Italian term, "thousand
flowers," used to describe mosaic glass objects.
Mosaic glass Vessels or objects are built
up of preformed elements of glass placed around or in a mold
and slowly heated until the glasses fuse together.
Overlay Blowing a bubble with color on
the inside, the bottom is attached to a solid core and then the
bubble is turned inside out, leaving a thin color "flash" on
Punty rod A solid metal rod used to transfer
and hold glass when working with a glory hole.
Sandblasting High-pressure air mixed
with sand applied to the surface of glass to carve texture.
Slump A technique used to form glass
using a mold, heat and gravity.
Thermal Shock Glass breakage caused by
rapid or uneven heating or cooling.