Poly vinylidene chloride-vinyl chloride emulsions (PVDC) were added as a substitute for chlorinated paraffin (CP) in the preparation of ultra-low density fiberboards (ULDFs). The micromorphology and fire performance of ULDFs were investigated using a scanning electron microscope. limiting oxygen index instrument. and cone calorimeter. https://www.markymarkscott.com/product-category/acid-wash-apple-cider-vinegar/