Itronics Inc. announced how Rock Kleen is expected to support expanded GOLD'n GRO Multi-Nutrient Fertilizer production by supplying nutrient raw materials and nutrient metals for use in manufacturing the GOLD'n GRO Fertilizers. Itronics says that the Rock Kleen silver/gold mine tailings processing research is showing that the revolutionary Rock Kleen technology neutralizes cyanide and recovers nitrogen, silver and gold, and base and ferrous metals and also recovers sulfur and potassium that is naturally contained in many silver/gold deposits. The Rock Kleen operations are proving to provide a whole new source of virgin raw materials. These raw materials can be supplied to the metal industries and certain nutrient raw materials can be supplied to the fertilizer industry. Industrial mineral materials will be supplied to industries including the Construction and Ceramics industries and those that use mineral fillers. Existing mines and tailings from past operating mines will be the source of these raw materials, reducing the need to build new mines to access these materials. Rock Kleen technology could revolutionize the way some of the raw materials are recovered while at the same time reducing the negative impacts of mining on the environment. Rock Kleen technology includes a proprietary sequence of steps and equipment in the application of an Itronics produced liquid called Rock Kleen. Commercialization of this technology is expected to permanently supply a portion of the recovered nutrient metals zinc, iron, manganese and copper, and the nitrogen, potassium, and sulfur for use as raw materials in GOLD'n GRO Multi-Nutrient Fertilizers. Surplus recovered metals will be sold into commercial markets. In the Rock Kleen mine tailings process a percentage of the liquid from which the metals have been extracted will be removed daily and replaced with fresh Rock Kleen liquid. Testing has shown that after metal extraction, the Rock Kleen liquid is metal free and still contains its nitrogen, sulfur, and potassium content. Because of this, the Company believes that this demetallized Rock Kleen liquid will be useable as a raw material in GOLD'n GRO Multi-Nutrient fertilizers. Itronics' business development plan is to establish a joint venture for each Rock Kleen project going forward. In each of the projects Rock Kleen liquid that is removed daily will be sold to Itronics for use in GOLD'n GRO fertilizers. Rock Kleen is currently progressing through the initial optimization test work for a major silver mine tailings project. Preliminary test work completed in November 2019 provided results showing that Rock Kleen was effective in recovering silver, gold, zinc, manganese, copper, nickel, and lead from the tailings. The focus of the current test work is to optimize recovery of metals, minerals, and nutrient materials. Itronics fully expects that significant quantities of iron will be added to the metals recovered and that measurable nitrogen and sulfur will be recovered as well.