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Measurement Condition

Media Fluorescent Brightener (OBA) Level

L*

a*

b*

M0

High

Value is higher (1 or 2 units)

Usually not effected

Value is slightly negative (bluer) by up to 2 units

Medium

Value is slightly higher (less than 1)

Usually not effected

Value is slightly negative (bluer) by up to 1 unit

Low

Usually not effected

Usually not effected

Usually not effected

M1

High

Value is higher (1 or 2 units)

Usually not effected

Value is negative (bluer) by up to 4 units

Medium

Value is less high (1 or less)

Usually not effected

Value is less negative (bluer) by up to 2 units

Low

Value is slightly higher (less than 1)

Usually not effected

Value is slightly negative (bluer) by up to 1 unit

M2

High

Usually not effected

Usually not effected

Usually not effected

Medium

Usually not effected

Usually not effected

Usually not effected

Low

Usually not effected

Usually not effected

Usually not effected

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