Coated printing paper
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Flatness
Table 2.1
Pronunciation
Subdomain (1st level):  Properties
Subdomain (2nd level):  Physical properties
Grammatical category:  Simple term
Grammar notes:  Uncountable
Definition:  Condition of paper when it has no curl, cockle or waviness.
Definition source:  EN 9
Context:  Curl and twist are deviations from flatness as a consequence of non-uniform hygroinstability through the thickness of the sheet.
Context source:  EN 48
Attestation:  2
Related terms:  Equilibrium relative humidity
It:  Planarità
Degree of reliability IT:  3
Fr:  À-plat
Degree of reliability FR:  3
Notes:  Flatness defects occur when equilibrium relative humidity is different from the humidity of air.