Re: Do dichromates change with age?
The bulb is quite new, and I haven't noticed any speed loss with
palladium. The integrator on the Amergraph reads UV, so that's the
reason I replaced my old NUARC with it (integrator in the NUARC reads
There are many other possible answers. Just wondering if dichromates
could lose potency.
On Jul 14, 2008, at 9:44 AM, Loris Medici wrote:
A question: does your unit have a light integrator? If yes, by saying
"longer exposure time" you mean "more units" right? If not (more
then could it be that your lightsource is getting weaker somehow
due bulb wear and/or voltage fluctuations)... Have you absolutely
out probable problems about electricity / integrator / bulb ect.?
14 Temmuz 2008, Pazartesi, 4:30 pm tarihinde, sam wang yazmış:
Has anyone come across any data about whether dichromates losing
speed, or effectiveness?
My jar of ammonium dichromate is probably over 20 years old (yeah, I
use very small quantity in gum printing) and it appears to suddenly
need longer exposure time. Doesn't make sense, especially since I'm
using an Amergraph printer for exposure. Humidity and everything else
has been kept fairly consistent.
Anyone else has similar experience?