WorkVenture gives you an inside look at what it's like to work at S.P.K. PLASTIC CO., LTD., office & team photos, reviews and more. This is the S.P.K. PLASTIC CO., LTD. Company Page. All content is posted anonymously by employees currently or previously working at S.P.K. PLASTIC CO., LTD..Apply to Jes InteriorApply to BridgestoneApply to Bangkok AutomachApply to J Group Business