There I observed an issue of yellow spots marks on box board paper ,customer claimimg spots are due to Optical brightener,as he is adding Optical brightener in mixing chest then this materail size with ASA and later coat with SBR resin.Kindly any one guide of these yellow spots on paper.
Remark to caco3 stone paper bej caco3
There I observed an issue of yellow spots marks on box board paper ,customer claimimg spots are due to Optical brightener,as he is adding Optical brightener in mixing chest then this materail size with ASA and later coat with SBR resin.Kindly any one guide of these yellow spots on paper.