Develop a formulation for a high performance, low cost iodophor

Develop a formulation for a iodophor (tit dip disinfectant) that complies with: - 20% free iodine - film forming, to remain on the cow's udder for a period of time after application and protect against mastitis or other bacterial infections - At least 6 month shelf life - must retain 20% free iodine when retested after 6 months - Mild or gentle for the cow's skin - Should be easily dilutable to a 1.5% concentration and this dilution should be stable also for 6 months - The formulation should be scaled up for production of batches of 1-4 mt - Cost effective: we want a product that can be marketed at competitive prices. This means we want the formulation to be as low cost as possible.