Lynchburg Insulators

A Collector's Guide

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Carbon Swirls

Examples of carbon swirls, black ribbons or swirls through the insulator, the result of foreign matter in the glass, often organic material such as sawdust that oxidizes releasing tiny gas bubbles that trap the black residue in the glass. While uncommon, they generally appeal only to specialty collectors.

carbon swirls
CD 106 with carbon swirls in skirt CD 162 with carbon swirls




Carbon swirls around skirt of CD 154 Carbon swirls / bubbles in crown of CD 154

Bi-Color

Color Swirls

Milk and Jade

Carbon Swirls

Bubbles

Inclusions

Dome Glass

Underpour

Overpour

Drip Points

Glass Folds

Sagging

Kisses

Marks

Ghost

Damaged Molds

Blotches