Granat WP meledak dan menyebarkan phosphorus putih ke segala arah, lalu phosphorus terbakar apabila ketika bertemu udara, dan terbakar dengan api kuning terang, sambil menghasilkan asap putih yang banyak phosphorus pentoksida.
WP grenades explode and spread white phosphorous smoke to all direction, the phosphor is then burnt when it comes into contact with the air, producing bright yellow flames, and lots of white smokes phosphorus pentaoxide.