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5/8 Purple Slag help


Fire1981

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A transitional is a hand gathered marble that is machine roller finished. The "transition" from fully hand made to fully machine made marbles. Early US and Japanese (and others countries?) companies made them in the early 1900's. They don't have to have a tail. 

And yes, there were both transitional and fully machine made slags. They are among the earliest of machine made marbles.

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Akroorka knows more than I do and has likely seen way more transitionals than I have. I have only a few in my collection. My question for you @akroorka is are the Asian transitionals Slags? The 2 Yasuda's I have resemble Akro corkscrews more than typical slags. Two colors yes, but nice clean corkscrew patterns.

For my own learning, as I understand it, slags are defined by more than just how the marble looks- it is also how they are made. Correct? Two colors, white and another, within a single stream of glass. Can you expand on that akroorka?

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A slag is defined as any transparent base colored marble (Amber, purple, green, red, etc... ) with opaque white running through it, weather hand gathered or machine made. A transitional is a different animal IMO, some are slag like and some are made of 2 opaque colors, just my opinion.

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@Chad G. @akroorka Follow up question- when does a slag become a swirl? So many WVS (and others) fit that definition of a slag. Colored transparent base glass with opaque white ribbons.

I have one I'll post in the id section tonight that I'm not sure which it is. Generally I know which ones I call slags and which I call swirls, but what is the actual official difference between a slag and a swirl?

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Good question here SequoiaBET.
“Slags” are a combined process where the two colors of glass are combined from the start from the furnace or in the old pots that hand-gathered marbles came from. 
 Most “Machine Made” “Swirls” are a two (or many more) stage process where one color meets another just before it is cut-off onto the rollers.
To really get an idea of this, you would have to study the machines and how they worked.
I have and it has helped me with my ID of marbles greatly—finding out how they were made by what machine. 
This is intense stuff and it will blow you away once you start to research it. I encourage you to do so along with the rest of the marble collecting community that we all belong to.
When I say that  “I just love this stuff” I mean it.
I have been down the “Rabbit’s Hole” for weeks on end researching marbles and the machinery that made them. (I spent a lot less on marbles while doing this and gained a whole bunch of knowledge that I am here to give away)
When I get locked on to a subject, I was/still am, like a virtual or book weirdo, just sucking in the info that I could/still find.
I just love this stuff,
Really I do!!!
Marble—On!!

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Thanks Akroorka, that makes sense about the difference. I have a very basic understanding of how marble making machines work. Mainly from reading about how JABO made theirs and from the book American Machine Made Marbles. If you know of any other good sources of info, I'd love to check them out. I agree, it is fascinating to learn about the various advances and contributions of people to the process- and also how the machines moved around amongst various companies.

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