Method for Determining the Amount of At Least One Sealant Applied to a Side Edge of a Composite Wood Board

A measuring method for determining the application amount of at least one sealing agent on at least one side edge of a wood-based board, in particular a floor panel, in a continuously running production line for applying the sealing agent,

• wherein the measuring method comprises the following steps:
• recording of at least one NIR spectrum of a plurality of reference samples of at least one sealing agent applied to a side edge of a wood-based board, wherein the at least one sealing agent has been applied in a known amount to the one side edge of a wood-based board, using at least one NIR measuring head in a wavelength range between 700 nm and 2000 nm;
• assigning the application amount of the at least one sealing agent of the reference samples to the recorded NIR spectra of the reference samples;
• and
• creating a calibration model for the correlation between the spectral data of the NIR spectra and the application amounts of the impregnating agent of the reference samples by means of multivariate data analysis;
• recording of at least one NIR spectrum of at least one sealing agent applied to a side edge using the at least one NIR measuring head in a wavelength range between 700 nm and 2000 nm;
• determining the application amount of the at least one sealing agent by comparing the NIR spectrum recorded for the sealing agent with the calibration model created;
• wherein the production line runs continuously at a speed of between 100 and 250 m/min.