Quote Originally Posted by Hexavalent View Post
Purity: 99% does not equal photographic grade. If that 1% necessitates further purification, there is likely no cost savings. BTDT.
Hello Ian,

I looked to Sigma Aldrich ,largest American chemical supplier and their purity changes %98 and %99 with different pricing but hundreds times more expensive than China. If you buy your photographic grade chemicals from another source , please give us a link with prices , purities.