Actually she didn't, but I was looking for an explanation of why it should go yellow, and plastic sprung to mind. As it was, she uses glass, so it must be something else, although glass can be contaminated too. And as quite a few knowledgeable people have said, the EIS ideally *should* be clear; I don't know any other way to say it. It *can* be yellow but this is not generally recognised as being the ideal, although all right. To me, if the EIS is stable then there is no reason why it can't be in clear glass/plastic. Some are under the erroneous impression that it *should* be stored in coloured vessels which is what I wanted to correct. And it isn't always easy to see the colour when poured out if you only have a small dose. I have poured a dose from a coloured batch and it looked clear in the spoon but yellow in the bottle. dee

On 3 Nov 2009, at 13:59, MaryAnn Helland wrote:

Hi Dee. Don't want to be argumentative -- but I always worry about statements that a person *should* do something, because it connotates right and wrong -- which can confuse a person new to EIS.

EIS *can* be stored in clear bottles would be more accurate. For myself, I prefer to store mine in Cobalt blue glass bottles. When I pour it out to use it, I can clearly see if it's still clear or if it has changed color. So far, that has never happened. I didn't see where she said anything about using plastic. ???
MA