Paper density measures a paper product's mass per unit volume. == Measurement == The density can be calculated by dividing the grammage of paper (in grams per square metre or "gsm") by its caliper (usually in micrometres, occasionally in mils).
Paper density measures a paper product's mass per unit volume. == Measurement == The density can be calculated by dividing the grammage of paper (in grams per square metre or "gsm") by its caliper (usually in micrometres, occasionally in mils).
Source: Wikipedia "Paper density" · CC BY-SA 4.0
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