http://blog.chromix.com/2010/07/transmissive-profiles.html
Now, these profiles are faster, better and less expensive. Since that post in 2010 we have invested in a state-of-the-art Barbieri LFP spectrophotometer, which makes it possible to take transmissive measurements using our standard target.
The word "transmissive" means we are capturing the measurements of the color as it passes through the clear or semi-opaque material. The effect of a light source transmitting through the semi-clear media and through the ink can best be captured using a spectrophotometer that is specially made for this purpose. You might use transmissive profiles if you are producing images intended to be back-lit in light boxes or other such displays.
Before, we would have to charge $150 per profile for RGB Transmissive profiles because of the great deal of handling involved in making these measurements using the DTP-41T. Now, we use the same target we use for the ColorValet Pro service. This means that ColorValet Pro customers can now get transmissive profiles for only $49 more per profile. And for our regular ColorValet customers, we have been able to lower our price for standalone RGB transmissive profiles to $99.00. (CMYK transmissive profiles are still $150.)
https://www.chromix.com/colorgear/shop/productdetail.cxsa?toolid=50191
