... -1,,FR-2,CEM-1,CEM-3Process Requirements: Solder MaskColorgreen,light green,white,black,dark brown,yellow,red,blueMin. solder mask clearance0 ... tin, Carbon ink,peelable mask 3). Solder mask colour: Green/MATT Green/Blue/Yello/White/Black/Red4). Board Size: 650mm*1000mm5). Board ... system,Ensure the quality of all products High precision manufacturing Shenzhen high precision double-sided FR4 pcb board