When sourcing scrap glass, the price is heavily dictated by purity levels and color sorting. You must specify the cullet size (e.g., fine powder vs. 1-2 inch chunks) and the color category (Flint/Clear, Amber, or Emerald/Green). Clear glass (Flint) typically commands the highest price due to its versatility. Additionally, ensure the moisture content is below 5% and the contamination rate (non-glass materials like ceramics, stones, or metals) is less than 0.01% to avoid processing surcharges or batch rejection.