On Tue, 24 May 2005 18:15:46 -0400, "Patrick Taylor"
<patricktaylor@sympatico.ca> wrote:
[color=blue][color=green]
>> The big advantage to using clear glass bottles is it is easy to watch
>> the sediment.[/color]
>
>Isn't there a good reason why green bottles are used in beer making?
>Because it filters out harmful light I thought?
>"Green might be a hip and trendy colour for a bottle carrying a hip and
>trendy beer, but it's not an ideal colour for glass when it comes to
>actually storing beer. Why? Because green glass, unlike your more
>traditional brown glass, lets through damaging wavelengths of ultraviolet
>and visible violet, indigo and blue light. These wavelengths of light can
>create off flavours in beer in a process known as 'light strike'. Aside from
>beer, some clear and green bottles may also leave certain wines, medicines,
>personal care products and vegetable oils vulnerable to light-induced
>damage."
>
>[url]http://www.future.org.au/news_2005/april/a_nano.html[/url]
>[/color]

No argument there. My homebrew will be light struck if I leave it by
a window with no covering. So far I've only encountered one Heineken
case in >10 years and that got some direct sunlight for close to a
year. My cases have no tops, but a sheet or two of newspaper is all
it takes to cut the light from the window. The case that was struck
was close to a window and on top of the other cases - and the row of
bottles by the window and second rank were affected.

The more damaging wavelengths are in sunlight and fluorescent
lighting. And it takes time before the taste is detectable. It isn't
like I store my beer on wire shelves in high intensity fluorescent
lighting (the way supermarkets store Heiny).

It is probably less of a problem than most homebrewers think - but
then it depends on lighting conditions in the storage places. And
some hops may be more susceptible than others.

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