How do I read the formulas in the PANTONE FORMULA GUIDE?
The PANTONE formula guide expresses the ink formula in a percentage mixture. The percentage formula is a percentage-of-the-whole formula, which is why the numbers add up to 100. To use this formula, you must first determine the volume of ink that you are going to mix. As an example, assume that you wanted to mix one pound of ink to match PANTONE 185. Since 1 lb = 16 ounces, 16 is your whole. The formula would break down as follows:
PANTONE Warm Red - 16 x 50% = 8 oz
PANTONE Rubine Red - 16 x 50% = 8 oz