I had a problem with 1 batch in 1998. It turns out the chemical storage bottles' cap had a leak & the stuff oxidized. At about that time I got some 1 liter packets with caked chemicals. Returned them to Kodak & got good ones in return. I'm not happy about the demise of the 1 ltr packets as I prefer to mix my chemicals in small batches.(posted 8163 days ago)