Fig. 1. Schematics of laser processing. (a) Diagram of equipment operating; (b) diagram of sample processing

Fig. 2. Effect of laser treatment time on viscosity of group A samples

Fig. 3. Effect of laser treatment time on viscosity of group B samples

Fig. 4. Stable shear viscosity of KGM samples after laser treatment. (a) Group A samples; (b) group B samples

Fig. 5. Modulus of KGM under optimum degradation conditions

Fig. 6. DSC analysis of KGM under optimum degradation conditions

Fig. 7. FT-IR analysis of KGM under optimum degradation conditions

Fig. 8. Diagrams of laser degradation mechanism. (a) Molecular chain cleavage; (b) β-1,4 glycosidic bond cleavage

Fig. 9. Molecular structures before and after laser degradation