What is Sowerby glass?

A short explanation of Sowerby Glass: They made high quality, hand-blown, Venetian-style glass and initially employed workers brought from Italy. But it is Sowerby’s high quality pressed glass that is best know today.

What is Bagley glass?

Bagley Glass started out as bottle-makers in 1871 in Knottingley (south-east of Leeds), Northern England. Most Bagley designs were made in huge numbers, with clear or matt satin finishes, in amber, pastel blue, pastel green, rose pink, amethyst, yellow, and clear glass. They were marketed under the name Crystaltynt.

What is slag glass?

Slag glass gets its name from slag, or the byproduct of steel production. When iron ore is smelted in that process, the remaining residue is a glass-like, often glossy material that takes on different colors depending on the minerals and elements present in the iron.

How was uranium glass made?

Uranium glass is glass which has had uranium, usually in oxide diuranate form, added to a glass mix before melting for colouration. The proportion usually varies from trace levels to about two percent uranium by weight, although some 20th-century pieces were made with up to 25 percent uranium.

How can you tell Davidson glass?

Davidson’s pearline glass is virtually always marked with a number or (on very early pieces) the word “Patent”. The number is the British registration number of that particular pattern, and identifies the manufacturer and the date of registration.

How much is slag glass worth?

How Much Is Slag Glass Worth? Slag glass antique items can run anywhere in value from a low of $50 to a high of $1,500. Typically slag glass antiques will be vases, dishes, bowls and decorative figurines and picture frames.

Is slag glass still made?

Slag glass, also commonly known as Malachite glass, is pressed glass made in the same way as Milk glass, but with coloured streaks to create a marble effect. Many of the same designs for milk glass were also produced in slag glass. Modern slag glass is still being made today in USA, and comes in a variety of colours.

Does anyone still make uranium glass?

Today, a few manufacturers continue the vaseline glass tradition: Fenton Glass, Mosser Glass, Gibson Glass and Jack Loranger. U.S. production of uranium glasses ceased in the middle years of World War II because of the government’s confiscation of uranium supplies for the Manhattan Project from 1942 to 1958.

Is it safe to drink out of uranium glass?

In reference to Uranium glass’ radioactivity, it should be noted that, while pieces from the late-19th and early-20th centuries were comprised of 2-25% uranium, the level of radioactivity is still negligible in the long run; people are exposed to radioactive materials every day and, while we wouldn’t recommend eating …

What is Vaseline Pearline glass?

Pearline glass consists of pressed glass in either lemon yellow ‘Primrose’, clear ‘Moonshine’ or blue, with a white opalescent rim. Yellow pearline glass is often referred to as ‘Vaseline glass’ due to it’s similar colour to pertroleum jelly. A Victorian uranium yellow primrose pearline glass “Linking Rings” bowl.

Is it safe to have uranium glass?

Uranium glass also fluoresces bright green under ultraviolet light and can register above background radiation on a sufficiently sensitive Geiger counter, although most pieces of uranium glass are considered to be harmless and only negligibly radioactive.

What is the rarest color of slag glass?

brown malachite
Sowerby’s slag glasswares, along with the similar pressed glass designs of contemporaneous English makers Davidson and Greener & Company, are still some of the most coveted today, particularly those that feature their unique brown malachite glass.

When did John George Sowerby start making glass?

An introduction to the coloured glass produced by the Sowerby company between 1875 and 1885 when John George Sowerby was managing the company, concentrating specifically on the glass colours used in pressed glass from this period.

What did JG Sowerby do for a living?

Sowerby, J. G. Sept. 15 1871) for a mould to produce an article with more than one colour of glass. JG was also a talented artist and produced many of the designs and designed many of the moulds for the company’s most successful products in the 1870s and 1880s. He was also responsible for a new type of glass which appeared in 1877.

What kind of glass is black with a Sowerby Mark?

So, the term ‘Slag Glass’ could possibly refer to purple malachite or black glass. The only thing we can say with certainty is that if a piece of glass has a Sowerby mark, is black, opaque and with a good surface shine it is (probably) Jet vitro-Porcelain.

What kind of Glass did Sowerby use to make malachite?

Sowerby mixed white ‘Opal’ with either blue, green, purple glass to produce Malachite. It is confusing but the purple and white marbled glass which we all know, Sowerby called ‘brown malachite’. We know this because page 3 of Pattern Book VIII 1880/1 is dedicated to ‘Brown Malachite’.