Hi, so what plastic is used in trays like Ciscolite? Rich
On Fri, Dec 2, 2016 at 5:47 PM, Eric Nelson <dmarc-noreply@xxxxxxxxxxxxx>
wrote:
Further to this, I have chems stored in plastic here, unused with no
darkroom for the last 4 yrs. Found my sodium sulphide had become a highly
saturated solution and eaten thru the Tech Chem original bottle which then
ate away at the painted metal shelf it sat on.
Bangkok weather and chems don't mix well.
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On Saturday, December 3, 2016, 7:30 AM, Howard Efner <
hfefner@xxxxxxxxxxxxx> wrote:
Tim Et. Al., Glass is the best container for darkroom chemistry. After
that, PET (soda) bottles would work or barrier packaging. The problem with
most plastics is that they are permeable to oxygen and carbon dioxide which
will cause developer oxidation and pH change from carbon dioxide pick-up.
Avoid any type of polyethylene (milk bottles) since it has all of the
barrier properties of a screen door. Oxygen and carbon dioxide do not hurt
milk.
Howard Efner
73 de KF5RGU
On Dec 2, 2016, at 1:02 PM, Tim Daneliuk wrote:
Call all Chemists (Howard that means you, et al)bottles
It is well recorded that darkroom chemistry is best stored in dark glass
As I understand it, the plastic used in things like cubtainers allowsoxygen
passage and thus oxidation.containers.
So are NO plastics OK for storage of, say, developers? HD Poly? LD Poly?
Anything at all?
For the record, I keep developers in glass, but fixers get stored in the
gallon jug the original distilled water got shipped in.
Just curious because I saw a lovely catalog of industrial plastic
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