Dichroic Glass combined with fused glass makes dichroic jewelry of the higest quality.

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Dichroic Glass Jewelry

Chill Mark       An area on a hot worked fused glass piece, that has become slighlty cracked on the surface as a result of being over-exposed to steel

Chimney       See Lamp Chimney

Chine       Variegated, speckled or figured dichroic glass. GANTAD

Chords       Uneven composition in dichroic fused glass jewelry, often barely visible as refractions of light or images in what should be uniformly clear. Often form when glass has been cooked for a long time in a pot without being drawn down and refilled. Will distort light paths in finished pieces and can be source of strain in dichroic fused glass jewelry that may cause breakage.

Cinquefoil       a garland having five loops.

Circlets       small circles of millefiori canes.

Cire Perdue       The French for 'Lost Wax. This is a process in which a model is carved in wax then has a mold built up around it. When this is heated, the wax melts and runs out through small holes in the base of the mold, which is thus left with the exact contours of the original wax model. The mold can then be filled with molten fused glass or bronze which, on cooling, appears as an exact replica of its original model. Some molds are re-usable, others are destroyed when opened. René Lalique used this technique for his early glass. and Frederick Carder used it from 1933. GANTAD

Clear Ground)       term used for a weight in which the motif rests on clear dichroic glass.

Clock dome       A smooth thin dichroic glass cylinder with a hemispherical top that was originally used to cover open work tabletop clocks and is used also for displays of dolls, etc. Rarely done by hand today.

Cloisonné       A process in which 'cloisons', thin metal partitions are shaped into a pattern; soldered to a metal backing; after which ground fused glass (enamel) is placed in the openings between the wire to create a design. The dichroic glass jewelry is then melted into the spaces between the wires. It is a very detailed process, being more of metal working then dichroic fused glass jewelry. The metal is usually gold or silver.

Cloisonné bottle       a bottle (usually a Chinese snuff container) covered with soldered metal bands between which powdered enamel is placed and fired.

Close Concentric Millefiori       a common spacing scheme in millefiori weights: tightly packed concentric circles of canes around a central floret.

Close Millefiori       general name for any spacing scheme in millefiori weights which features a tightly packed random arrangement of millefiori canes.

Close Packed Millefiori       same as close millefiori.

Closure       the device used to seal a bottle, e.g., cork, cap, stopper, etc.

Cobalt Oxide       A metallic oxide used to color fused glass jewelry, producing a very wide range of blues, from pale shades to rich, dark ones. GANTAD

Codd stopper       a bottle closure.

Coefficient of Expansion COE       dichroic glass (and other materials) have a measurable rate of change in size as temperature increases. This is the Coefficient of Expansion (COE) and can be used to compare fused glass jewelryes for compatibility. Unfortunately, a measured or calculated COE is often for a low temperature, say 100 to 300, and the COE at 900 is different, so a compatibility test still has to be carried out. The COE can be measured or calculated from the quantities of ingredients. These often produce COE's that are quite different but still useful because they are consistent. Spruce Pine 87 is called that because its calculated COE is 87, while its tested/measured COE is 96. As long as one knows which is being used, things work out.

Cogwheel       millefiori cane which has been molded with a serrated edge. This type of cane edge is quite common on silhouette canes.

Coin in Bubble       A hollow knob on a lid or knop in a stem can contain a coin. A bubble must be blown and set on the part already blown or on a punty, opened, the coin inserted and the bubble sealed. (NEGG fig. 167-169)

Cold Work       Using grinding wheels, wet sanders, a diamond drills, U/V Glues… to shape, flaten or polish dichroic fused glass jewelry at normal temperatures

Cold Working       All operations that involve etching, engraving, grinding, cutting or polishing the dichroic glass after it has been annealed are considered coldworking. It may involve nothing more than grinding the bottom flat, polishing that, and engraving a signature. Or it may involve carving away great parts of the fused glass, sandblasting the surface, or cutting the dichroic glass jewelry into brilliant designs. While many artists use the procedures of cold working as part of their artistic creation, most would prefer to avoid the labor intensive process of grinding off punty marks and polishing the result. dichroic fused glass jewelry must always be worked wet; otherwise heat builds up rapidly and damages the tools and causes cracking in the glass.

Colloidal silica       used as a rigidizer for frax and for making molds. "micro-fine particles of silicon dioxide(SiO2 ) dispersed in water. 30%-40% SiO2 is common. If the particles are smaller than about 7nm [0.000000007m 0.00000027"] the sol is almost as clear as water. From 10 to 30nm there is a characteristic opalescence or translucency when seen it, and above about 50nm the appearance is white and milky." colloidal silica site

Dichroic Jewelry Definitions 1 | Dichroic Jewelry Definitions 2 | Dichroic Jewelry Definitions 3
Dichroic Jewelry Definitions 4 | Dichroic Jewelry Definitions 5 | Dichroic Jewelry Definitions 6