Duraglas milk bottle dating

Contents:
  1. DATE CODES
  2. Owens-Illinois Glass Company
  3. How to Date Owens-Illinois Glass
  4. Machine Made Dating

Vintage presto supreme mason d- 12 manufactured by Owen's- Illinois glass company. From the looks it is probably for the 40's or 50's. Bottle, cap and label are in nice condition. This will make a great addition to a collection or perfect for kitchen decor! Vintage made in Wichita, KS 7up 7 oz.

Bathing Suit Duraglas Soda Bottle.

A Love Letter to Glass

Made in in Wichita KS. Green Duraglas glass bottle. Includes original aluminum pouring lid with flapper. A nice collectible piece of Arizona history! No copyright on bottle Excellent condition. The bottle has textured glass.

DATE CODES

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Manager says machines are fast coming into play in bottle industry, plans eventually to have machines in place of "carrying in boys. Clarksburg, West Virginia" Library of Congress. This two table semi-automatic machine would have been hand fed with glass furnace likely to the right and does have the two different mold sets with the parison molds where the first "press" part of the cycle took place the set on the right.

Owens-Illinois Glass Company

Blowing air would have been supplied by the hose visible at the top of the set of blow molds to the left, where the final "blow" part of the cycle took place. This allows for a high probability begin date of around to for most wide mouth, machine-made bottles and jars Illinois Glass Company , , However, since the products of automatic and semi-automatic non-Owens machines date from the same era as the Owens machine and are largely indistinguishable, they are all considered together on this machine-made bottle dating page. Mouth-blown to Machine-made Transition Era: The transition from mouth-blown to machine-made bottles was a fairly long and circuitous road.

Between and about or , the only fully automatic machine was the Owens Automatic Bottle Machine and until the late s they were granting exclusive licenses for various categories of bottles. In about , reliable gob-feeders became available which converted most types of semi-automatic machines to fully automatic at a lower cost than the Owens Machines. For instance the Carr-Lowery Glass Company Baltimore, MD began automatic bottle making in , but retained some hand-blowing operations until at least when Dr.

Toulouse published Bottle Makers and Their Marks! In one glass factory a wall had to be erected between the hand operations and the newly installed machine to prevent sabotage. In another instance, worker opposition was so strong that the machine operations were abandoned! These numbers help to determine general dating break probabilities for both machine-made and mouth-blown bottles. Likewise, the probability that a bottle exhibiting mouth-blown hand-made diagnostic features dating prior to the mids is very high and after the s is very low, though not impossible as noted above.

The link below allows a user to view an amazing short movie clip that shows two different early Owens Automatic Bottle Machines in operation. The first machine is the "Machine 5" which the film clip script notes as having been made in in Toledo, Ohio.

How to Date Owens-Illinois Glass

This was apparently the earliest of the viable commercial machines, and in fact, the clip was made to help promote and sell the machine to potential buyers. The first person shown operating Machine 5 is Emil Bock, a mechanical genius who worked with Michael Owens from the "bicycle pump" early machine experimentation days s and transformed Mike's ideas into workable steel machines.

Michael Owens is the second person shown picking up and examining a couple beer bottles. This clip is also reported to be the only movie ever made showing Michael Owens who was reputed to be "camera shy. Film clip is compliments of the Owens-Illinois Glass Company. Many thanks to Phil Perry - a senior engineer with that company - who graciously provided this clip.

Film clip of an early Owens Automatic Bottle Machine in operation. Machine-made Bottle Dating As with mouth-blown bottles, more precise dating of a machine-made bottle can be done with some confidence by using one or more of the various diagnostic features outlined in the questions on this page.

Unlike the first portions of the Dating key Questions 1 through 3 on the main Bottle Dating page; 4 through 7 on the Mouth-blown bottles portion of the dating key , each question on this page is an independent dating tool for which the response is not predicated on the outcome of any of the other questions. Thus, these questions do not have to be viewed in order.


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The question numbers on this page continue where they left off on the mouth-blown bottle portion of the key. Is the bottle glass color aqua aquamarine or very light green , essentially colorless clear , or a color other than colorless or aqua? Are there "bubbles" present in the glass? Does the bottle have the following statement embossed on its side or on the base?

Does the bottle base have similar markings to those on the bottle pictured? These markings are those of the Owens-Illinois Glass Company.


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  • Duraglas milk bottle dating!
  • Duraglas milk bottle dating!

Does the bottle have a finish lip that was sealed with a cork, sealed with an externally threaded screw cap, or sealed with some other type closure? Does the bottle have embossed or labeled contents or volume capacity information? Does all or a portion of the bottle base have a textured pattern, i. Read through each of the questions to see which have pertinence to the bottle you wish to date.

Hyperlink to other web pages that are suggested in each question for added information and then read the summary statement at the end of this page which will give some suggestions on where on this website a user could or should proceed to. Keep track of the specific diagnostic feature date ranges listed in each question you consult, and once to the end of the page, use that information to ascertain the likely production date range of your bottle.

As explained previously above, be aware that the "earliest" date used in the questions is not absolute. There were some wide mouth, semi-automatic machine produced bottles albeit a very low percentage which had machine-made characteristics minus a suction scar than can date back as early as the mids. Lets begin with Question 8 right below Is the bottle glass color: A color other than colorless or aqua? The color of the glass in a machine-made bottle can, to a limited degree, be useful in dating.

As with all of the dating points on this page, color must be considered in conjunction with other diagnostic characteristics in arriving at a probable date or date range for any given bottle - the "preponderance of evidence" concept. With the increasing dominance of the automatic bottle machine in the s and on, bottle shapes, sizes, and colors became more and more standardized and uniform, i.

Glass making technology progressed so that colorless aka "clear" glass became much cheaper to produce and displaced aqua as the dominant bottle glass color for containers where being able to see the products natural color was an important consideration. An assortment of other colors were still common - particularly amber and to some degree, cobalt blue - but the range of common colors present in machine-made bottles was restricted compared to bottles produced in the 19th century.

Bottle made from manganese dioxide decolorized glass exhibiting a slight lavender cast in the thick portions of the glass. Small utility bottle - ca.


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  6. Click on Groves Chill Tonic to view a picture of an aqua medicinal from the era. The bottle pictured in Question 9 below with a plethora of bubbles in the glass would be considered a particular deep shade of aqua. The amount of aqua glass bottles produced declines throughout this period so that by the mid to late s the dominant colors for machine-made bottles excluding soda bottles and canning jars is colorless or amber. Royal Crown Cola, Dr.

    Pepper both a greenish aqua , and Coca-Cola "Georgia Green" are familiar examples of late era aqua bottles Toulouse For more information on this color, click a qua to go to its description on the Bottle Colors page. Bottle is of largely colorless aka "clear" glass Machine-made bottles with colorless glass can date from any time after , though there is a relatively reliable dating break possible based on the type of colorless glass.

    Decolorizing is in essence neutralizing the effects of the iron and carbonaceous impurities in the glass mix in order to obtain as colorless of glass as possible. The primary physical masking agents used in the first half of the 20th century were manganese dioxide, selenium, and arsenic. All potentially leave a very slight residual color to the glass that is usually visible when looking closely at the thickest portion of the base or sides.

    For more information click colorless glass to go to that section of the Bottle Colors page.

    Machine Made Dating

    Manganese dioxide causes the glass to have a very slight lavender or amethyst tint which is amplified to varying degrees with exposure to sunlight or artificial radiation. When selenium or arsenic or a combination of the two is used to decolorize glass, it often leaves a very faint "straw" cast to the thick glass portions which is not affected or intensified by sunlight. It has been thought for many years that selenium produced the "straw" cast to otherwise colorless - and almost exclusively - machine-made bottles.

    However, it is now thought to be a function of using arsenic - probably in tandem with selenium - as the decolorizer [Tooley ; Lockhart pers. The following dating refinements are possible with colorless machine-made bottles: The large majority of machine-made bottles with a slight to moderate lavender or amethyst tint - indicating manganese oxide was used as the decolorizer - date between and the early s top picture above right; click small amethyst wide-mouth bottle for a picture of this entire bottle though some can date as late as the s. Machine-made s oda bottles were generally not decolorized with manganese after Lockhart a.

    Based on empirical observations, one or both of these decolorizers are still in use today although after the s other decolorizing agents and glass producing processes were used resulting in less abundant "straw" tinted bottles. Bottle made of some other color of glass If the bottle has some other glass color no useful general dating information is possible.