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How
are they made?
I make gray cards using flat wall paint from Walmart.
I have the store mix a quart of Color Place brand Flat Wall accent base
#5053 to color #4301. They call it "Slate Grey". One quart will make about
100 8x10 inch grey cards by painting pieces of matt board or other scap.
How
do you get the right gray?
There are some gray matt board materials that can be used
without painting. When selecting a paint or matt board. I use a light meter
and I compare the gray I select or create with that of a commercial gray
card. The samples need to be checked to be sure they are comparable in
various types of light. Some grays are too warm or cool and may give a
different results from different light sources.
But
why?
If you are a teacher, and you want all your students to learn
how to use them, it is cheaper to make them in quantity than to buy them.
A student assistant can make them and get paid. They come much less than
you have to pay for the real thing.
Back to Using a Gray Card by Marvin Bartel
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