Sample Preparation Hint
One of the most common mistakes in sample preparation is trying
to cut too wide a surface with the razor blade. End grain is very hard and,
the more wood in contact with the blade edge at a given time, the harder it
is to cut. Since you only need a surface about 1/8” wide to observe growth
ring features, that is all the wider your sample needs to be. So, use a sharp
knife to chamfer the edges before you cut the final surface with a razor blade.
If the end-grain surface of your sample piece is very wide, use a fine-toothed
saw or triangular file to place a notch near one edge.