GradesExamples… Dark mode Text at small sizes can be harder to read when the black and white are reversed. The white tends to weaken slightly as the contrast switches on the details of letters. Johannes Gutenberg’s work on the printing press began in approximately 1436 when he partnered with Andreas Heilmann, owner of a paper mill. Johannes Gutenberg’s work on the printing press began in approximately 1436 when he partnered with Andreas Heilmann, owner of a paper mill. Grades, used even in small amounts, can add the strength of the text back in with no change to format. Johannes Gutenberg’s work on the printing press began in approximately 1436 when he partnered with Andreas Heilmann, owner of a paper mill. Johannes Gutenberg’s work on the printing press began in approximately 1436 when he partnered with Andreas Heilmann, owner of a paper mill. Experiment with this example