OS-473 is a 35% carbonate solution used to develop semi-aqueous and aqueous dry films as well as liquid or dry film photoimageable solder masks. Water with hardness in excess of 300 ppm (as CaCO3) can be used with OS-473 without the formation of water scale. This greatly reduces the need for maintenance of the spray equipment.
OS-490 is a more concentrated version of OS-473 utilizing only Potassium Carbonate to develop semi-aqueous and aqueous dry films as well as liquid or dry film photoimageable solder masks. OS-490 uses the same cleaning agent used in OS-473.
SC-3 SCREEN CLEANER is a specialty blend of esters used to clean screens. This material will remove solder masks, legend inks and primary image inks. This product is free of glycol ethers (“butyls”) and chlorinated solvents. SC3 is classified as non-hazardous. SC-3 SCREEN CLEANER is distillable and fuel blendable. This product has a high flash point, excellent solvency and a low vapor pressure. Further; it is biodegradable.