View Full Version : Panchromatic Emulsion
06-21-2009, 03:27 PM
I had problems with one dye. I forget the # offhand and would have to look it up. All the rest were very soluable, but one dye required the solution be made up at 1/2 the normal strength that I use.
If I can get to it, I'll look it up for you. I am really backed up right now. Too much to do and too little time.
06-22-2009, 11:07 AM
Too much to do and too little time.
Ain't dat da troot!
11-28-2009, 04:38 PM
Hello PE and All,
I have finaly gotten back to the dyes SDA3057 and SDE3008. They have been in brown glass at 4 degrees F for about 6 m0nths now. The SDA 3057 is stll in what looks like a true solution. The SDE 3008, which always looked odd, as though it were only partialy disolved, had a definate residue. I proceded to add MeOH untill I has a true solution. Final concentration: 0.2% by weight.
Both dyes have been treated like royalty and I am confident that they have been at 4F all this time and there is no contamination. My MeOH is Reagent grade.
At the moment, I am out of AgNO3. But I intend to get back to work on this next week. I hope that I am not working with "bad" dye.
11-28-2009, 04:43 PM
What was the concentration before you diluted it?
11-28-2009, 07:03 PM
I stored both dyes at 1% in MeOH. The SDA3057 is stll at 1%.
The SDE8006 is at 0.2% as of today. The undisolved material in the 1% SDE8006 was very obvious. Red sediment at the bottom of the container.