RE: ferric oxalate
13 Kasım 2008, Perşembe, 12:25 am tarihinde, Judy Seigel yazmış: > ... for instance, threw out a large hunk of ferric ammonium > citrate because it had turned into just that -- a really hard, solid hunk. > > It could have been 5 years old, but was well packaged (tightly wrapped in > supposedly air and water tight plastic)... Anyway, I was suprised... Surprising indeed! I have 5 y/o FAC which is perfectly fine (I still use it for mixing Cyanotype solution A), still looks the same and works the same when I first opened the container... The only reason I can think of is; somehow, the container wasn't airtight so it got moisture in the air (it's a quite hygroscopic material). Maybe you could crush it in a mortar and microwave it to get rid of water. On the other hand, it's relatively cheap to justify such a PIA... Regards, Loris.
|