Here is my attempts, part deaux, to work successfully with a light box and lighting to create those perfect white backgrounds.
This time I properly set the camera’s white balance to 5500K which is the temperature of the bulbs I’m using. I realized that the room lighting was throwing a blue cast, so switched those off. Working only with the lighting for the box.
Other settings I used this time were Spot Metering, and + Exposure Compensation up to +2 to help blow out the white background.
Using a matte white poster board, this is the out of camera result.
With the Highlight ‘blinkers’ turned on in camera, these two photos showed the background blown out. Most likely because I was shooting in RAW, when bringing the images into Lightroom 4, the highlights were not shown when looking at the histogram.
So back to the brush to dodge (lighten) the background and voila !
Adding the filters: Detail extraction, foliage (bright), and white neutralizer. I brought the image back into Lightroom 4 and worked on the brushing out the background for a whiter white. I left some areas untouched so you can see the difference.
I think I’m heading down the right track, I just need a lot more practice. It’ll be easier now that I have this setup. I did discover though that the sensor of my Canon 60D needs to be professionally cleaned!