Founded by the owner’s grandfather, Plus Jack is a company that manufactures optical parts since 1988. Their own brand was launched in 2011. Company manufactures wide range of products from glasses, sunglasses, loupes glasses, miscellaneous things and accessories. The material used is vegetable resin cellulose acetate, which strong, durable, and flexible to wear on. The processes of cutting, shaping, bending, sticking, polishing, embedding and hammering are all done in-house.