I'm late into this color thing, maybe someone else has already chimed in on 
this.
My neighbor sees blues very differently than I do.  She sees more purple in 
them than I do.
I have worked with color blind people who see colors wildly different than I 
do.
I have books from the same publisher whose color photos are different even 
at a casual glance.
I've dealt with people who interpret color by how they smell.
And while it's really cool the fancy technologies available, as we saw from 
other posts of similar subjects the money ain't available for many of our 
projects.

But, keep on trucking.  The road of interpretation is open for many 
destinations.
----- Original Message ----- 
From: "Robert Hunter" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, February 25, 2012 8:12 AM
Subject: Re: Colorimeters and Spectrophotometers on Ceramics


Hi John


If you are simply interested in the range of glaze color in the British 
refined earthenwares from circa 1770 - 1830 or so, you are more than welcome 
to visit sometime and I can give you a two-hour overview of the variables 
related to that issue before you begin your colorimeter recordings.  While 
George has spent many years researching that period, I have spent almost the 
same amount of time documenting extant China glaze examples from this long 
period of time to better understand the evolution of the decoration, 
identify manufacturers, and understand stylistic changes.


Beyond our articles which George has given the references, the new books by 
Lois Roberts are essential to anyone who is interested in the evolution of 
China glaze.  Science and machines have their place in analysis...certainly 
no one uses XRF and other techniques more than I do for ceramic research 
issues...but  the basic techniques of connoisseurship-the experience that 
comes from hands-on observations also have a place.  Sadly, these more 
intuitive approach are  rarely included in today's archaeological curricula.


Some snaphots of these "snowflakes" (that is, no two alike) may be of some 
use:


http://ceramicsinamerica.blogspot.com/2012/02/color-variation-in-british-china-glaze.html


Please note these selected examples represent approximately 50 years of 
British ceramic production, numerous manufactures and every example pictured 
(there are many, many more) has a slightly different color.


Rob



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