>>Solder mask appling 

Rigid PCB

ColorsGreen,Blue,Red,White,Black,Yellow,Clear
Min solder mask web3MIL
Finish&TextureSemi-gloss,Matte
Tented viasYes
Solder mask plugged viasYes
Solder mask over copper1.2MIL(double coat)
Min Gap to Gap 2MIL
Min Copper ring Under mask-defined pad1MIL
LPI MaskYes
Dry film maskYes
Flexible PCBColorsGreen,white,Yellow
Min sold mask web3MIL
Tented viasYes
Solder mask plugged viasYes
Min gap to gap2MIL
Min copper ring Under mask-defined pad1Mil