Abstract
GFRP is a composite material with a number of useful features in terms of tensile strength and both impact and chemical resistance. GFRP components are widely used for design and die stamping and decoration by machining and printing technology. However, these machining and printing technologies have problems with regard to abrasion quality and chemical resistance, and therefore improvements are required. This study focused on the development of a clearer laser marking method. A laser marking method using multiphoton absorption of a femtosecond laser was developed to achieve clear marking without any surface damage. The inner parts marked by this technique showed chemical resistance.
