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Below are some terms, abbreviations, and acronyms we use on this site
ABP American Brilliant Period. While not an EAPG descriptive term, it is used to designate the timeframe for higher quality Cut Glass manufacturing in America, from roughly 1880 to 1925. (note: Cut Glass is not considered EAPG)
AFAWK As Far As We Know
Annealing Line A visible line on the edge of a piece resembling a smooth-edged, stable, and shallow crack, or wavy lines in the center of a piece, that result from the annealing (cooling) process. These are often (incorrectly) referred to as a "straw marks" but occur in the making well before the glass is cool enough to be placed on any combustible surface!
AH Applied Handle. A handle that was applied by the glassmaker(s) instead of being pressed as part of the mold. The norm for art and blown glass items!
Clambroth The term we use to describe a translucent white color of glass. It can vary in the amount of translucency. A more solid white colored glass is considered Milk Glass.
Clear The term we use to describe colorless glass (similar to modern window glass), usually as it pertains to the base item. Treatments such as etching, staining, or painting are often applied to Clear glass, e.g. Ruby Stain over Clear.
Cordial A smaller stemmed drinking vessel that is about 2 to 3 inches in height.
Emb Embossed
Engr Engraved
Flash or Flashing Welker defines Flashing as: The process of a glass item being dipped into hot glass of another color in such a manner to cause only a thin layer of it to adhere. This is a less expensive method for making a piece of glass appear to have been made in a solid color. This is a blown glass method and is not to be confused with staining used on pressed glass.   (I couldn't have said it any better myself!)
Also see Stain or Staining.
Flint A term used to refer to glass made with a lead oxide or "red lead" content, commonly produced before the Civil War when lead became scarce. Flint glass typically produces a prolonged ringing tone when tapped gently, although some heavier items may not exhibit as much of this characteristic.
Also see Non-Flint.
Goblet A larger stemmed drinking vessel that is about 5 to 6 inches in height. There may be more than one size goblet in the some patterns, e.g. there may be both a smaller Lady's and a larger Gentleman's goblet. Some patterns may have a Buttermilk goblet with a larger than normal diameter.
Heat Check A visible but stable hairline crack near the attachment point(s) of an applied handle, which does not enter the main body of the item. It can usually be felt with a fingernail, but if not, it's more likely an internal imperfection due to the "hand made" nature of the handle.
HS High Standard. Typically between 2 and 5 inches in height. See Standard.
HTF Hard To Find.
LS Low Standard. Typically about one inch in height. See Standard.
Milk Glass or "Milk White". The terms we use to describe a solid white color of glass. Translucent white glass is considered Clambroth glass.
Non-flint A term used to refer to glass made with a soda-lime content, commonly produced after the Civil War. This type of glass was less expensive, easier to press in a mold, and makes up of the majority of EAPG. It brought glass tableware to the masses.
Also see Flint.
NOS Not Original Stopper. A stopper that is undocumented or is a replacement. It typically does not fit as well.
NS No Stopper. An item that currently does not have a stopper.
(1) The stopper may simply be missing,
(2) The item might have originally been made without a stopper, or
(3) The type of Original Stopper is currently unknown.
ODB Our Daily Bread. An acronym used when describing EAPG bread plates. The complete embossed slogan is typically "Give Us This Day Our Daily Bread".
OMN Original Manufacturer's Name (or Number). The name or number assigned to this pattern or item by the original manufacturer. This is usually established based on a period catalog or advertisement (or reprint).
OS Original Stopper. A stopper that has been documented to have been produced for this item (it matches).
Noting that some items may have more than one valid type of Original Stopper.
Original Stoppers are usually ground to fit the item's opening very snugly. In some cases the item and the Original Stopper will have matching etched numbers.
Pot Stone An unmelted inclusion in a finished piece of glass, picked up during the gathering of the molten glass. It more commonly occurs in early or blown glass pieces, but has shown up in pressed glass pieces too. It can be a reasonably good indicator of an item's age.
(R) What we use to denote a reproduction or reissued item.
Soft Scratch The fine scratches or wear that occurs after glass has been in use for 100+ years (or so). It usually occurs on the base or foot of an item but may occur elsewhere, for example when items are stacked or stored closely to one another. It can be a reasonably good indicator of an item's age.
Souv Souvenir. May be an applied, embossed, engraved, enamelled, etched, gilded, or other decoration.
Stain or Staining Welker defines Staining as: A process of coating a piece of glass with a chemical whose true color is developed by heat. This is the least expensive way of coloring glass. The staining material is painted on the annealed [cooled] article with a brush wherever the decorative effect is desired. It is then fired on for permanency at which time the glass assumes the desired color.   (I couldn't have said it any better myself!)
Typically found on EAPG as Ruby Stain or Amber Stain over Clear glass, but staining may also be found in rose (Maiden's Blush), blue, green, yellow, or infrequently in other colors.
Also see Flash or Flashing.
Standard A term commonly used to describe the column that exists between the bottom (foot) and the top (bowl or other) parts of am item, such as a compote or a cake stand. Typically items like compotes have Standards whereas items like goblets have Stems.
Stem A term commonly used to describe the column that exists between the foot and bowl of a drinking vessel. Typically items like goblets, wines, and cordials have Stems whereas items like compotes have Standards.
Stemware A term used to collectively describe Goblets, Wines, Cordials, and similar items.
Sun Purple The process where prolonged exposure to the sun's rays can cause clear glass to acquire a purplish hue.
While some degree of Sun Purple may occur over 100+ years of aging, especially in the southern and western USA, we generally avoid this type of glass since we believe the early glass makers went to great lengths to produce a high quality Clear glass.
We definitely avoid Sun Purple glass when the effect has been intentionally induced (prolonged sun exposure or irradiation) and strongly encourage others to avoid it too.
Wine A stemmed drinking vessel that is about 4 inches in height. EAPG Wines typically hold about 2 ounces.

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