My color checker is broken and I need to replace the plastic piece. I used a snipped plastic square from some plants just as Mark did in the video, because I had them around. But the ones I have are really cheap and flimsy -- and brittle. I'm wondering if anybody can recommend an easily obtainable replacement that can be cut relatively easily but is somewhat strong and stiff enough to stand up to use as a color testing platform. I like cutting it so the bottom edge disappears behind the eyehole but I guess I can just paint that part black if it comes to that.
grateful for any advice