This formula was designed to be extra heavy for far casting or deep water fishing, without the use of salt or glass(I will do some with these in the future), It uses tungsten-iron-silica powder (aka black sand), i would recommend this recipe for anyone with a ball mill( as the powder must be fine). When handling this material please wear a face mask, goggles, and remove any nearby magnets. Please work out side if possible, when it is not windy. Formula 3DH or 3-third D-Durable H-Heavy. Keep in mind that this formula is theoretical, reason is I don't know what you may be working with as far as equipment.
Percentage of Materials
-67% DINP Plastecizer
-15% Emulsion PVC Paste Resin
-2% Soybean oil or Mineral oil (90% pure mineral oil)
-3% Tin Thermal Stabaliser (Tetramethyltin)
-5% Dispersent (website on dispersents https://www.byk.com/en/additives/applications/plastics-industry/pvc-plastisols.php I do not work for any of the companies mentioned in this website)
-8% Black Sand .1 microns to .75 microns