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Topic: Spectrophotometers (4 msgs / 90 lines)
1) From: Jim Cordero
Is anyone familiar with the Madison Instruments Javajlytic Spectrophotometer?
  I've read about the Agtron and thought is was the industry standard. My employer just purchased the Javalytic and we used it today. The companies website doesn't give much technical detail. I'm also wondering if the numbering system is the same. 
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2) From: raymanowen
I was leaning toward the Cosar SOS-40 and other similar instruments like Mac
Beth color reflection densitometers. Most spectrophotometers are
transmission instruments, aren't they?
I'm reminded of the Bausch & Lomb Spectronic 20 and the Perkin Elmer AA we
had at CSM.
Big color printers used the densitometers to match the printed colors to the
proofs when they switched lot numbers on their printing inks. They could
even be set up to measure a 3-D object like a coffee bean.
A densitometer could tell you exactly what the surface color is, but nothing
about what's under the hood. I'd love to use the instruments I used to
calibrate and repair, but to what end?
Cheers -RayO, aka Opa!
Scamtron is an Ag

3) From: John Moody
Measure the color of the ground beans to see what’s under the hood.
John

4) From: raymanowen
Isn't the Agtron system for use when roasting, to determine degree of roast
without lifting any skirts?
I totally agree- the ground beans' color will tell the condition of the
major part of the roast, not just the 0.001% at the surface.
Couldn't two beans appear to Scamtron to have identical degrees of roast,
having arrived at that point via totally different profiles?
The quality completely invisible to Scamtron is, "How does it taste?"
One person, using a fixed (not Static) profile on a given bean and roast
size might judge when to stop His roast, based on the color of the beans in
addition to other indicators.
Cheers -RayO, aka Opa!
Avoid Ags
On 4/25/07, John Moody  wrote:
<Snip>
-- 
"When the theme hits the bass, I dance the Jig!" - -Virgil Fox at the Mighty
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