APOS CureKT determines the surface curing degree inline after the short cycle KT-press. CureKT replaces sampling and acid testing. CureKT determines the degree of hardening objectively, regardless of personal assessment. Determination directly after the KT-press on the board moving past. Values available to the second. Possibility of ad-hoc reaction, e.g. by adjusting the pressing time or pressure. Non-destructive, optical process. No damaged boards and no loss. No personnel expenses.