Blue Fluorescent Gelatin Methacryloyl (Blue Fluorescent GelMA) is methacryloyl gelatin (GelMA) with green fluorescence, which is obtained by “grafting” fluorescent molecules on GelMA. Blue Fluorescent Gelatin Methacryloyl acts as a scaffold and can be used to engineer tissue analogs from the vasculature to cartilage and bone, allowing cells to proliferate and spread. Blue Fluorescent Gelatin Methacryloyl is often used in cell culture, biological 3D printing, tissue engineering, etc^[1][2].