Digital BW, The Print

> -----Original Message-----
> From: wilfredm71047 [mailto:wilfredm@...]
> Sent: Friday, August 22, 2003 7:53 PM
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: [Digital BW] Densitometer
>
>
> Does anyone know how I might find the correct "calibration standard"
> for a Cosar 43 densitometer? Or can someone advise me of a way to
> calibrate it?
>

Wilfred,

I am not familiar with that brand but if it is like other units you need a
specific standard from the manufacturer. I assume you cannot locate them or
they are out of business.

Without the factory calibration standards you can always correlate it to any
known standard. For instance you could measure a step wedge with a
densitometer that is calibrated and then read the same wedge using your
Cosar 43. From the two sets of readings you could then calculate correction
factors for the Cosar over the density range.

If you don't have access to another densitometer, you can purchase
calibrated reflective step wedges from Stouffer in the $15 to $40 range.

http://www.stouffer.net/Stoufferhome1.htm

Martin Wesley
http://www.borderless-photos.de/guests.html