color correction card advice

Im about to do a huge event where I photograph 50 sets of people and I realized that a color correction card would help speed up the color correction process. I dont nkow what its actually called, its got a 18% neutral gray, white and black columns.

So my question is, where can I get one thats fairly cheap? One idea is to get it printed at whcc and use it for those 3 weeks, I realize it would fade over time, but it should last 3 weeks no problem.

Gray Card - http://www.bhphotovide​o.com …ard&N=0&Initial​Search=yes

Any photography store should have them if they sell equipment.

Google for WhiBal that costs but might help???

do I only need the grey, or does the black/white help in post?

I'd really recommend a Colorchecker Passport. It is small, rugged, easily hung round your neck and I use it multiple times per shoot now whereas I rarely bothered to take out a full size card.

Small review here :

http://www.northlight-images.co.uk …orchecker-passport_1.html

Interesting, do all the extra colors really help with color correction? compared to an all grey card?

msfvirginia wrote in post #10094061
Interesting, do all the extra colors really help with color correction? compared to an all grey card?

A bit of a control freak so, if the lighting conditions are a bit odd (early morning, weird tungsten etc.) I generate a custom profile using the card and the Xrite Lightroom plugin then white balance as normal from the chart. Usually works a treat and gives me a solid starting point for future edits.

msfvirginia wrote in post #10094061
Interesting, do all the extra colors really help with color correction? compared to an all grey card?

It depends on your work flow. If you like to set the black & white points, then yes, it would help to have a standard to start with. Remember that the "correct" WB isn't necessarily the "right" WB for a particular image? Would you want to neutralize the nice colors in a sunset? I tend to go by my eye, so this works for me: Gray Card…White Paper. What’s best?