Eapg Glass
Can anyone tell me just what I should be seeing when I look at pattern/EAPG glass with a black light!?
I have been asked to look at some old pattern glass that I am trying to sell with a black light, and tell the potential customer what I see. What would I see? Does this apply to ALL old pattern glass?? Should I invest in a black light for future purchases? Do I need this to identify all old pattern glass/EAPG glass? Thank you!
“Black Lights” are actually ultraviolet lamps, usually portable handheld types, used by glass buyers in an effort to determine the age of clear glass. (They are also used to verify authentic vaseline glass but that will be discussed elsewhere.) It is believed by many that if clear glass glows yellow under a black light, it is proof that the glass article was manufactured prior to about 1915 when the formula from which glass was made changed. It would be great if it was as simple as that!
And there is a thought that the property that causes the “glow” is the element manganese. There are other sources of flourescence–the phenomenon in which light is absorbed at one wavelength, then emitted at a lower energy wavelength along the ROY G BIV spectrum. Uranium salts used in vaseline glass will also cause the shift to green-yellow and much more efficiently. You can see the yellow-green glow from Vaseline glass in the daylight; whereas the “manganese” glow needs a darkened room. Uranium was also used to create some blues, such as the blue clambroth of Atterbury and the blue of the split horn of plenty vase that is blue on one side and clear on the other & in the formula for EAPG “apple green”.
Actually, the results of the use of black lights is fraught with exceptions. In addition to the many, many mixed messages concerning the use of black lights on glass, different hues strike different eyes as different colors; yellow- green- blue- white and when different types of black lights are thrown into the mix, it’s a veritable Ultraviolet Jungle out there!
It would be great to have some hard and fast guide lines, but there simply aren’t many easy rules! We once visited an elderly gentleman who had written a book on Gillinder glass but couldn’t afford to publish it. He had lots of WESTWARD HO and other pieces of EAPG and he gave us a lesson in black lights. He had 2 of them; one was electric and one was a portable (like ours). He could differentiate between Westward Ho originals and repros with his 2 lights. But they all glowed what I call ‘yellow’ with our lamp. There are apparently lots of wave lengths and filters on UV black lights on the market and whatever the elements in glass that glow are (big controversy here also), they react differently to the various lamps.
When looking at old glass with a black light, some see yellow as green & some see blue as white. For purposes here, we’ll define “old” as pre-1916. To really use a light for benefit, a person needs to look at dozens of pieces of glass with their own black light and learn what ‘known’ old glass looks like then compare unknown aged pieces against that color of glow. After lots of looking, we believe the only ‘TRUTH’ is:
IF ITS NOT FLINT & IT DOESN’T GLOW YELLOW/GREEN
UNDER A (OUR PORTABLE) BLACK LIGHT, ITS NOT OLD.
Ergo, if it’s not flint & glows yellow, it may be old OR it may NOT be old. Yikes!
To determine flint or lead glass, which generally glows “white” or “blue” or even “yellow” depending on the percentage of lead in the glass and the impurities mixed therewith, the characteristic “ring” when the glass is tapped is an additional consideration although, again, in some forms the relative weight of the item may more telling than the bell-tone. Flint pieces with a scoop shape, like bowls and some stems may give a bell-tone when thumped, but master salts and other “compact” pieces are never going to “resonate” although they may have a characteristic “ping” when tapped with a piece of metal. And then consider the variations in amount of flint (lead) in various pieces by various factories! Some patterns were made only in flint and really only a few patterns were made in both flint & non-flint & that info is generally available in the literature.
When you get into old glass out of the general EAPG patterns, it can REALLY get hairy. Bottom line is that UV lights for telling age and flint/non-flint is pretty complicated! Best bet is to buy from an experienced, knowledgeable dealer if it really matters to you whether or not you’re getting “flint” or original issues of EAPG. OR pay the price (tuition) to “learn by doing” like so many of us have.
opaque_shakers_from_Mainely_Glass.wmv
|
|
EAPG Ripley DAKOTA Baby Thumbprint Goblet Fern Etch $24.95 |
|
|
EAPG RIVERSIDE GLASS RARE RADIANT (HOBBLE SKIRT) SUGAR WITH LID $24.00 |
|
|
ANTIQUE EAPG VICTORIAN PRESSED GLASS COVERED COMPOTE STAND DISH $134.99 |
|
|
EAPG Greentown Chocolate Beaded Dolphin w/ lid and lots of RED AGATE $55.00 |
|
|
1910 EAPG Westmoreland Bridal Rosettes Checkerboard Pattern Crystal Salt $15.95 |
|
|
EXCELLENT! EAPG New Jersey Pattern Butter Dish W/Gold Flash $39.99 |
|
|
Fostoria EAPG Captain Kidd Ruby Flash Spooner & Tumbler, Circa 1889 $49.00 |
|
|
EAPG 1916 John Higbee Glass Company – Banner Pattern #99 – Floral Oval $15.00 |
|
|
EAPG Greentown Chocolate Leaf Bracket Sugar w/lid $5.00 |
|
|
victorian milk glass dresser bottle decanter vanity Forget Me Nots blue EAPG $9.95 |
|
|
EAPG DUGAN SPIRALEX SWUNG GLASS VASE 9″ T X 5 1/2″ W X 4″ W BASE EARLY 1900′S $19.99 |
|
|
EAPG “ROSE IN SNOW” 2 TAB CAKE PLATE/PLATTTER 10″W 1880′S U.S. GLASS,OHIO GLASS $19.95 |
|
|
EAPG Greentown Chocolate Cactus Tumbler $10.00 |
|
|
EAPG VICTORIAN PRESSED BRILLIANT GLASS AURORA COMPOTE STAND ANTIQUE 1888-1902 $94.99 |
|
|
EAPG Daisy & Button Tulip Goblet Vase N/R $19.99 |
|
|
SUPER EAPG WILLOW GROVE PARK PA SOUVENIR GLASS BATH TUB $9.95 |
|
|
EAPG Greentown Chocolate Cactus Mug $15.00 |
|
|
EAPG Greentown related item Chocolate Beaded Triangle 6.25″ Vase $35.00 |
|
|
EAPG Antique Glass Plate Block Criss Cross Flint Early American Pressed $2.99 |
|
|
EAPG Greentown Chocolate Scalloped Flange 6″ Vase $15.00 |
|
|
EAPG ANTIQUE GLASS PEDESTAL CAKE STAND PLATE – BRYCE PLEAT & PANEL $175.00 |
|
|
Vintage Ruby Red Amberina Carnival Creamer Sugar Bowl EAPG Pressed Saw tooth $39.99 |
|
|
EAPG 1898-1906 Bryce Higbee Arched Fleur-de-Lis Celery Vase $99.99 |
|
|
Vintage Pair McKee EAPG Rock Crystal Two Light Candleabra $24.99 |
|
|
EAPG 1897 George Duncan Button w Gold Etch Celery Vase, AKA Daisy/Diamond $89.99 |
|
|
RARE antique 19THc EAPG 3 SEAM flint Patterned glass FAN Spooner Open Sugar VASE $29.00 |
|
|
Bryce Higbee Spires Band Pattern Blue Goblet Squared Dot EAPG $19.95 |
|
|
EAPG pressed glass tall vase $99.95 |
|
|
VICTORIAN EAPG PRESSED GLASS WATER PITCHER WITH SILVER PLATE SPOUT $165.00 |
|
|
EAPG DUNCAN & MILLER “MARDI GRAS” COVERED SUGAR – 1898 $9.99 |
|
|
ANTIQUE EAPG TOTHPICK HONEYCOMB STYLE PATTERN $9.99 |
|
|
1898 COLORADO Emerald Green Tumbler*U.S. Glass Victorian EAPG $18.95 |
|
|
Antique Amber Daisy & Button Glass Shoe Slipper 1886 George Duncan EAPG Nice $22.99 |
|
|
EAPG Punch Bowl NuCut Vintage Imperial Glass with Pedestal $299.99 |
|
|
Pair Of Miniature Green EAPG Child’s Candlesticks $9.99 |
|
|
Scarce Antique AMBERINA Colored Red Yellow Glass EAPG Tumbler Goblet $29.95 |
|
|
EAPG BEATTY GLASS BLUE DAISY & BUTTON “V” CHILD’S CUP $12.50 |
|
|
EAPG NORTHWOOD BLUE OPALESCENT CONSOLE BOWL MEANDER PATTERN $37.50 |
|
|
EAPG FLINT BOSTON & SANDWICH SPOONER $20.00 |
|
|
VICTORIAN EAPG SERPENT 5.25″ BUD VASE – SPIRAL ENCIRCLED with GOLD SNAKE $9.99 |
|
|
Early American Pattern Glass (EAPG) – Amber Square Serving or Snack 6 1/2 x 6 1/2 Inch Dish Early American Pattern Glass (EAPG) – Amber 6 1/2 x 6 1/2 Inch Dish… |
|
|
GL422 – US Glass antique EAPG Kings Crown toothpick holder … |
|
|
Vintage 1880-1910 Early American Pattern Glass (EAPG) – Pressed Glass – Triple Divided Rectangle Relish Serving Dish Vintage 1880-1910 Early American Pattern Glass (EAPG) – Triple Divided Rectangle Relish Serving Dish… |
|
|
Men’s Princeton Variety +2.50 Reading Glasses, 4-Pk $25.77 … |
|
|
Early American Pattern Glass: Collector’s Identification & Price Guide $24.95 Jam-packed with invaluable and indispensable information, this is the Pattern Glass guide that every collector needs.This completely revised and updated edition provides a comprehensive listing of Pattern Glass pieces for nearly 400 patterns. Each pattern includes alternate names, original production numbers, reproduction information, and references. Detailed descriptions of each piece list size, … |
|
|
Early American Pattern Glass $17.95 … |
|
|
Early American Pattern Glass Cake Stands & Serving Pieces $29.95 This is the first book on identifying Early American Pattern Glass cake stands. It features 1,150 photographs, mostly color, of cake plates and their pedestals, as well as descriptions of the patterns themselves. Its easy-to-use format presents pattern names listed alphabetically by popular name. Measurements, colors, stains or decorations, dates made, manufacturers’ names, and values are included… |
|
|
The Danish Glass Beer Glass $34 The Danish Glass Beer Glass |
|
|
Glass $165 This is the first book to discuss the correlation between the performance of industrial processes and practice-relevant properties, such as strength and optical properties. Interdisciplinary in his approach, the author discusses both the science and technology, starting with glass past and present, its structure, and rheology. The sections on properties include mechanical strength and contact resistance, ageing, mechanics of glass processes, the production and control of residual stresses, high-tech producers and current research and development. Applications covered include glazing, packaging, optical glass, glass fibers for reinforcement, and abrasive tools. |
|
|
Glass skopa $90 Glass skopa |
|
|
Glass Lid $48 Glass Lid |
|
|
Glass Coaster $21 Glass Coaster |
|
|
Storage Glass $12 Storage Glass |
|
|
Glass Bowl $45 Glass Bowl |
|
|
Meeting Glass $6 Meeting Glass |
