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Ceraplast Industries


Quality Control


Quality Control

Repeated testing on various stages of every batch throughout the manufacturing process enables us to ensure quality and safety of our products. On average, a batch is tested six times. Every week our Technical staff in our full-scale quality control laboratory perform as many as 1,000 tests on raw materials, in-process product batches, and finished product.Arising in Industry :
  • Lumps Too Fine :  Plasters will create lumps during paste preparation.
  • Inconsistency :   Inconsistency of plaster setting time.
  • Lower productivity and inconsistent quality of molds.
  • Fragile Molds :   Low bending strength plasters will produce molds that do not resist tough handling by workers.
  • Short Mold Life :   Low mechanical strength plasters yield too low mold surface hardness.
  • Cracks :   Plaster that expands or shrinks too much will make cracks on surface.
  • Fast Setting Time :   Too Fast Setting Time of Plaster : means not enough time to release bubbles, which results in lower strength, so risks of breakage during the handling of molds.
  • Long Drying Time :   Plaster with bad porosity will bring too long drying time of molds after usage.
  • Surface Problems :   Hard particles in plaster will destroy surface of your product.
  • High Iron Content :  Plaster will create black spots on clay ware.
  • Set Plaster Lumps :  Plaster badly protected from moisture will have lumps that will destroy surface of clay ware.
Quality Parameters that We Consider Are :
  • Plaster water ratio
  • Initial Setting Time
  • Final Setting time
  • % Rise in temperature
  • M.O.R
  • Acid Insoluble
  • Porosity
  • Silica Content
  • Iron Content
  • 1 hour kg/cm2
  • Combined Water ratio



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