Seeking an Alternative to Color Densitometer Transmission Calibration Strip

Hensol woods

A
Hensol woods

  • 0
  • 0
  • 20
Hensol woods

A
Hensol woods

  • 0
  • 0
  • 28
books

A
books

  • 4
  • 1
  • 138

Recent Classifieds

Forum statistics

Threads
197,295
Messages
2,757,149
Members
99,452
Latest member
corydon
Recent bookmarks
0

LomoSnap

Member
Joined
Apr 19, 2023
Messages
51
Location
China Nanjing
Format
Med. Format RF
I recently bought a color densitometer, but it does not come with a transmission calibration strip. I am looking for a transmission calibration strip with color reference data like the Xrite 810-88.
I tried using a Stouffer for bw density calibration, but there is no color density reference.
Are there any transmission color calibration strips still in production?
 

koraks

Moderator
Moderator
Joined
Nov 29, 2018
Messages
20,459
Location
Europe
Format
Multi Format
I tried using a Stouffer for bw density calibration, but there is no color density reference.

You can get in the ballpark by assuming (yes, dangerous) that the Stouffer is neutral density. Visual inspection suggests it's fairly close to neutral, so has a practical workaround until you find something more solid, it may be an OK starting point.

Are there any transmission color calibration strips still in production?

I think they were often specific to the device or at least product family.
 

John Salim

Member
Joined
Apr 15, 2014
Messages
238
Location
Southend Essex
Format
Multi Format
What densitometer do you have ?
If your machine has pre-set controls to calibrate zero level on each RGB channel and controls to calibrate slope, you don't need a colour strip, just a calibrated absorber ( ND filter ) to set the slope.

John S
 
OP
OP

LomoSnap

Member
Joined
Apr 19, 2023
Messages
51
Location
China Nanjing
Format
Med. Format RF
What densitometer do you have ?
If your machine has pre-set controls to calibrate zero level on each RGB channel and controls to calibrate slope, you don't need a colour strip, just a calibrated absorber ( ND filter ) to set the slope.

John S
I have an ESECO TR90 densitometer.
It can be zeroed without film, then calibrated at about 3.0D and the reference density entered, it does not have a manual slope setting.

You mentioned using ND filters for calibration, which is indeed an idea, but I think even very high-quality ND filters will not attenuate the three colors of light in exactly the same way.
 

ic-racer

Member
Joined
Feb 25, 2007
Messages
16,476
Location
USA
Format
Multi Format
What koraks wrote; see my calibration target is close to ND:

 
Photrio.com contains affiliate links to products. We may receive a commission for purchases made through these links.
To read our full affiliate disclosure statement please click Here.

PHOTRIO PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Ilford ADOX Freestyle Photographic Stearman Press Weldon Color Lab Blue Moon Camera & Machine
Top Bottom