Figure F1. Schematic drawings of the LAS instrumentation setup. The first setup (A) is used when there is an abundance of powdered sample. In this case, the light probe is placed directly on the sample. The second setup (B) is used when the sample is limited or oddly shaped. The first technique is preferred since it gives a more accurate total reflectance value.

Figure F1. Schematic drawings of the LAS instrumentation setup. The first setup (A) is used when there is an abundance of powdered sample. In this case, the light probe is placed directly on the sample. The second setup (B) is used when the sample is limited or oddly shaped. The first technique is preferred since it gives a more accurate total reflectance value.