Hello to all, I promised to not mention this again. But my newest quote from Sands has moved SDA3057 from too expensive all the way down to moderate. Here is the breakdown. 1 gram 450.OO 5 grams 1995.00 10 grams 1795.00 25 grams 3925.oo I checked with Sands today, about why 10 grams cost less than 5 grams. Its not a typo, theirs or mine. These prices are correct. PE is an advocate of SDA3057, He recently reveled that SDA3057 was the red sensitizer for codachrome. I now substitute a small c for a capital K in all things CODAC. That oughta teach them to not drop there greatest products,like Techpan and pan matrix film. Realy.