Glass Terminology For Beginners

Acid Etching

This is the process in which you etch the surface of glass with hydrofluoric acid. For decorative acid etching, the glass must first be covered with wax before scratching in the design.

Acid Stamping

Stamping is done by using a device that is almost identical to a rubber stamp to apply the hydrofluoric acid.


A oven that is used to cool glass down. The oven starts cooling the glass at 900 degrees Fahrenheit and slowly brings the glass down to room temperature over a course of 12 hours.


Process of reheating blown glass within the Glory Hole.


One single piece of glass that is created by fusing multiple canes/rods together.


Technique used for decorating hot glass just by dropping blobs of colored glass onto the surface of the glass piece.


Technique used for creating a glass object by inflating a large mass of molten glass with a blowpipe.


Carving is done by removing any excess glass off of the object you are working on.


A crack in a glass surface.

Double Overlay

Putting two coats on a glass object.


Lettering that is raised or lowered on the surface of glass.


Grinding and polishing a glass object.


When molten glass is placed at the end of a blowpipe.

Glory Hole

An oven that is used heat and reheat glass.

Hand Blown

Handmade glass objects.


A set of large tongs that create score lines within the neck of a glass piece.

Kevlar Gloves

Gloves that are high heat resistant.


A wooden tool that is used to flatten the bottom of a glass object.

Piece Mold

A glass piece that is made out of more than one part.


The process of removing a layer of glass.


Colored glass.


Tweezers are used to pull and pinch glass.