Grade 3.5—change in color equivalent
to Gray Scale Step 3-4.
Grade 3—change in color equivalent
to Gray Scale Step 3.
Grade 2.5—change in color equivalent
to Gray Scale Step 2-3.
Grade 2—change in color equivalent
to Gray Scale Step 2.
Grade 1.5—change in color equivalent
to Gray Scale Step 1-2.
Grade 1—change in color equivalent
to Gray Scale Step 1.