These Sheets are sprayed with 25ml=0.834 FL fluid liquid k2. This liquid k2 is really a colorless and odorless. Therefore The main reason why its difficult to be detected. Every single sheet is impregnated with twenty five ml of K2 to make sure the utmost satisfaction with each puff. Regardless https://www.allspicek2.com/product/k2-spice-paper-for-sale/