Correction to: Journal of Archeological Method and Theory

https://doi.org/10.1007/s10816-022-09584-4

The Fig. 18 in the Main Text is not correct. The correct Fig. 18 is published below:

Fig. 18
figure 1

Problem to solve: “Does the trace contain organic materials?” According to the PCA analysis of the infrared data, there are three pathways to answer the question: green lines yield a favorable answer, the red ones to reject the hypothesis. The blue lines drive toward unclear answer