Answered By: Regan Brumagen
Last Updated: Nov 30, 2016     Views: 8

Our registrar's office doesn't have anything like that, but I am checking with a few other people here to see if they know of anything created by a Museum staff member! Sounds like a good idea, if one doesn't exist!

I'll be back in touch.



Asker Response:

               By the way, it is an interesting topic: is it useful to codify colors in describing glass objects? People interested in beads they usually do, and I know that a Munsell Beads Colors Charts does exist. But about objects, I know quite a few experiences, and using non-specific charts (as Pantone or others), created with different purposes. If I well remember (I cannot check it now), for example, in the catalogs of Roman, Sassanian, and Islamic glass of the CMOG, the colors aren't codified.


Librarian Answer:

Our registrar, Warren Bunn, said he is not aware of any color chart for glass objects here or at another institution. Our Rights and Reproductions Manager, Jill Thomas-Clark, said, "I am not aware of any standardized color chart for glass.  When we first got MIMSY, there was a big discussion about standardizing the words we, CMoG, used in cataloging our objects.  We initially decided not to use words like amethyst (use purple) or emerald, i.e. jewel colors.  For contemporary glass, the manufacturers have specific names/designations for their colors, but I do not think that would be of any help with European or ancient."  I guess that is not terribly helpful, but it appears we do not have a color chart at any rate. Do you know where you heard of the reference to a CMOG color chart?




Asker Response:

               Thank you for let me know the comments of your colleagues.
The existence of a CMOG color chart has been mentioned to me by a professor of Archeology, in Lisbon, two weeks ago. We were informally chatting about the methodology I used collecting the data for the PhD dissertation about archeological glass found in Portugal that I am currently writing. He insisted that using a chart is the best way to describe colors also for glass, and that charts are used and available on the market - among them, the CMOG one.
He doesn’t have anything to do with my PhD, and he is not a specialist on glass (I am!), so I didn’t have any problem in confuting his remarks. In fact, I find a chart unnecessary, because, in my opinion, the largest variability occurs in a reduce range of colors (think to medieval glass, for example: we can find a lot of different shadows from green to yellow, or from clear to green), and derives from the same well-known mechanisms, as for example the effects of iron oxide in the composition of the glass. To codify all of them comparing the glass with a chart is a consuming operation, and I couldn’t see any real advantage. By the way, after some experience in the past, almost no scholar is using this method today. You know, when you are writing you are always anxious about missing something important, that’s why I decided to contact you.
Thank you again, and let me know if CMOG one day decides to create a specific color chart for transparent glass: I would be glad to verify if it really works!

PS. A few days after the conversation, I discovered that the mentioned professor is a glass beads collector! I know that in the beads world they use some type of chart, that’s probably why he insisted on his suggestion. But most of the beads are opaque...

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