I'm still interested in what you folks have to say about light sensitivity of developers, though. All of the liquid concentrate developers I've used came in non-brown bottles. I think Kodak did use silver plastic bottles years ago, but now they seem to use ordinary (natural) translucent HDPE. So, I'm still curious as to whether there is really any substance behind the recommendation to keep developers in brown bottles.
Rather than light sensitivity I think it was the bottom line in that brown glass bottles were cheaper than colorless ones. The brown coloration is caused by an iron impurity in the glass. Colorless glass is more expensive because the iron must be removed.
A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.
A further observation concerning the relative costs of HDPE and PETE. This afternoon I was feeding bottles into the machine at a recycle center and noticed a sign concerning its bulk option. The center pays $0.60 per pound for HDPE and $1.07 per pound for PETE.
I have a plastic bottle i think is pet bot hdpe, when i fill it with biling degassed water ph drop from 7.3 to 8.7, if i fill it at room temperature ph remains equal 7.3, i read that max temperature usable is 60ºC. thanks but i don't know where is the problem
I bought yesterday this bear because of the cap and brown bottle:
I will store my chemicals in it.
At the OktoberFest does that bottle come in Kodiak size? It's the biggest bear I know of in a shade of brown The Kodak bear used to be the biggest but it has since shrunk. It is said to be due to its sudden shortsightedness and inability to recognise where its real food was