Hi,

I recently purchased X rite passport color checker and were impressed  till now with its use.

How ever have some query on how to accurate measure it..  Below is process I follow.

-   I set my strobes at suitable  power , then I use my light meter to take measurement under model chin and set the strobes as per light meter reading.
-   Once I get a perfect exposure, I put grey card side of X-rite passport checker under same light condition and take a picture of grey card �(Do I need to fill the frame or 70% of the frame with the grey card ?). I currently use 50-70 % of frame .
-   Then I set my canon camera white balance  to  use that image as Custom image.
-   Under same light then I take a picture of Xrite passport checker with 80% of checker in frame.
-   In post-production, as my while balance is already set for all images so I don�t touch image with grey card , however the picture with Xrite color checker with multiple color , I custom pick the color which I want to go for and then applies that to all images using lightroom 4. 
-   2nd concern was , In lightroom 4 when I choose picture which has my Xrite color checker and then try to create a profile based on same, thought it says operation successful, but it ask me to replace the earlier profile which I had created earlier from a different shoot ?

Please guide me if all my above process are right or somewhere I am going wrong as I am not getting the colors which I am looking for.
Rds
Robin

Erm ... I haven't got a clue what you are talking about.  I just set my camera to Auto WB and press the shutter button when I want to take a picture. I presume you have a modern DSLR camera? If so then let it do the hard work whilst you concentrate on the composition. I've never used (or even seen) a grey card in my life. They are not necessary for microstock.

Grey cards are useful when shooting in tricky situations, like mix of different temperature tungsten lights or in a forest with dense foliage, etc. However, in studio situation you can just set your wb according to the specs of the strobes you're using (normally 5600 K).

Firstly I shoot raw...

I shoot a picture with a x-rite some where middle in shooting session, shoot with the colorchecker and bw-side.

Sometimes I make new profile by a Colorchecker Passport program and I use it in Lr and Ps. But many times I use some older profile. This profiling system is  magnificent, without it raw images can include many problems, tiny problems like a banding or colors are too bright or dim.

And, if I want use wb of colorchecker image, it's easy. I set wb by colorchecker image and copy this setting to others images. 

I dont use the Colorcherker wb side to set camera's wb. I shoot with whatever, sun, auto, flash.. with a best for situation. That's nice in raw!

And.. my english is not good

5600K with Elinchrom RX. Auto with Canon Speedlite 580EX II. 5300 with Bowens continuous set. 5300 with Prophoto table (continuous). Gray card (black/grey/white Gretag-Macbeth) very rarely - only outdoors. No exceptions.