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by Glen and Steve Thistlewood
Particular thanks for information and expertise to:
Howard Seufer, Norman Montgomery, Dr. James Measell and Brian Pitman
With introduction by Brian Pitman

Are you ready for some controversy? I mean some REAL controversy. Well, here it comes.  Let's meander into the heart of something that has been debated many times this year in carnival glass, even pushing the ACGA membership meeting to record length to discuss it. Simply put, there are some out there who think that "someone" is currently turning Fenton bowls into Fenton plates. How? There are theories, many theories, and many stories as well.

I heard about this in depth at the ICGA convention (I remember some stuff Diane Fry had mentioned on her website before), but intensity of this conversation surpassed anything I had experienced on it before. The people who brought it up to me really believe this is happening (they are very serious about it), and they had some points and arguments that are pretty convincing. I took some pics of some pieces that were supposedly altered in this way, and I sent them to our Super Detective Team, the Thistlewoods.

What resulted was a month of full-on investigation, discussion, and a few dozen trips around the globe to get to the bottom of this. And now, they have the answers to many of the questions and points brought up.

Is it possible? Can a Carnival Glass bowl that was made back in the early 1900s be flattened into a plate today?

Let’s start by considering how a Classic Carnival Glass plate was usually made. The glass batch was around 2000 degrees F: the molten glass was then placed into a mould (shaped for a bowl) and the plunger inserted. The mould was opened and the bowl removed from the mould, then gripped by its marie (collar base) in a “snap”, reheated in a glory hole, then spun flat (by the finisher). The centrifugal force simply caused the bowl to assume the profile of a plate.

So why was it that plates were made from bowls back then, and not vice versa? We’d like to quote from one of our books: “The explanation for this was provided by Frank M. Fenton: “the reason is the need for a cutting joint to accommodate a variation in the volume of glass deposited in the mould. Fenton made some plates in recent years, but pressed them up-side-down in order to get a cutting surface (in the round shape, similar to a shallow marie) on the underside surface of the plate. In the older pieces this cutting surface was at the top edge of the bowl.” Dr. James Measell, Fenton historian, further observed that “it is possible to observe a slight curving at the outside edge of some plates” on the radial mould seams. This would have been caused by the distortion caused by spinning the plate out from the bowl shape.”

So, Fenton plates were originally made from bowls in the factory, at the point of production, while the glass was hot and still “plastic”. Is it possible, then, for the process to be applied today to old Carnival Glass bowls? Can an old bowl be heated up and turned into a plate?

If you want to try and re-fry a bowl into a plate, you’ve got to heat it up to around 1100 degrees F to make it pliable. You then would need additional heat to change the cupped up bowl shape outward and downward (evenly) to alter its profile to that of a plate. The chances of the bowl cracking are undoubtedly high. How many bowls would you want to experiment upon? And what would happen to any crimping (ruffles and flutes) on the bowl?

Some plates (mainly Fenton ones) have been observed with various characteristics that some have suggested may be caused by recent reheating / modification. We asked Howard Seufer for his opinion on these characteristics - and he kindly also asked Fenton’s Hot Metal foreman, Norman Montgomery and also Dr. James Measell.

Let’s look at these characteristics and see what they actually are:

Roughness on the base (marie) thought to be caused by reheating

Click image below to see a larger version in a new window.

This is a characteristic often seen on old Carnival Glass - a number of Classic items exhibit exactly this characteristic, it is simply a feature of pressed glass. Howard explained that “these are actually "oil marks" and are probably the result of wax or oil that was applied to the bottom (mould) plate and the volatiles in the application left pitted marks in the glass. (The oil and wax are used to lubricate the hinges of moulds and to cool the mould surfaces to prevent the glass from sticking to the iron.) There is a similar effect caused by a cold mould surface, which leaves an "orange peel" pattern in the glass.

Strange swirly marks

Click image below to see a larger version in a new window.

These are called Lap Marks, and they are another feature of old pressed glass that can be seen on a lot of old Carnival. Again Howard explained: “The "lap marks" were probably a result of slightly cooler glass being gathered (say 1800 degrees F. or lower) or the gather being held on the punty too long before being dropped in the mould. The outer layers cool and fold over each other and don't fully fill the mould pattern.”

Slumping - producing egg shaped depressions

Click an image below to see a larger version in a new window.

Once again, this feature occurs on old Carnival Glass. The photos show our amethyst Concord plate - and you can see what appear to be a gentle uneven-ness on the surface of the glass. There is a soft concave effect around the plate, coinciding with the panels (between the ribs) on the exterior. It’s just how the plate was made back in the early 1900s. We’ve had this plate for twenty years, and we bought it from a friend who had owned it for many years prior to that. It has an impeccable provenance (and it’s a scrumptious plate too).

You can see the same effect on the green Concord in the illustration too. Howard Seufer reports that exactly the same effect can be seen on some of the old plates in the Fenton Museum at Williamstown - right where they were made almost 100 years ago.


Back in the early days of Carnival Glass production, the phrase “Quality Control” was not in practical usage. There were no Quality Control Inspectors and many items left the factories less than perfect. The glass was low-priced and produced in quantity, and it was aimed at a market that wasn’t going to complain if there were a few funny little marks on it here and there.

If a bowl were to be re-heated today, in an attempt to turn it into a plate, none of the above pressed glass features would be indicators of such an attempt. So what would you expect to see? Well, first and foremost, probably a lot of broken glass, as let’s face it, reheating an almost-century-old bowl would not be quite as easy as cooking a stir fry.

Norman Montgomery, the hot metal foreman at Fenton, offered these additional views:
"The dope would probably change - craze or crackle - as it would stretch from the bowl to the plate shape. When reheated to the temperatures for slumping, the iron dope would probably discolor.”

And we’ll leave the last word to Dr. Jim Measell, who agrees with these views, and noted that the potential dollar losses would be large when experimenting (with bowls that would have to be rare enough to even try to turn them into plates) and he feels that it is highly unlikely that a bowl-to-plate operation is being done successfully.

Copyright 2006, G&S Thistlewood.  All Rights Reserved.
All photos are Copyright Glen and Stephen Thistlewood and Brian Pitman
and may not be copied or used in any form without permission.