Richard Knoppow wrote:
> "Lloyd Erlick" <Lloyd at @[EMAIL PROTECTED]
dot com> wrote in
> message news:s0c4h3hj61fr04lmgt2b9obvj3ieg4ibog@[EMAIL PROTECTED]
>> October 14, 2007, from Lloyd Erlick,
>>
>> Some time ago I posted about a darkroom
>> material called Colorine bulb dipping paint,
>> made by Rosco, the company that makes gels
>> and color filters. It comes in many colors,
>> and is meant to paint light bulbs specific
>> colors.
>>
>> The color I liked was number 27, safelight
>> red. I bought a little can, twenty bucks for
>> a half pint, and coated a number of small
>> light bulbs.
>>
>> I've been very slow to actually test any of
>> these, and I've only placed them distant from
>> photosensitive materials so far.
>>
>> Yesterday I did the simple 'CD darkroom
>> safelight test' on them. I held a CD under a
>> safelight, room lights off, and observed the
>> light reflected from the surface. There was a
>> definite blue component. Lights that have
>> proved safe reflect no blue light.
>>
>> I realize the test is not definitive (in the
>> case of a light that seems safe and reflects
>> no blue) but as far as I am concerned these
>> lights are not safe and I'm not bothering
>> with painting light bulbs any more. It's
>> possible they need a second or third coat,
>> but I'm not sniffing that stuff any more just
>> to see if it works, and I'm sorry I brought
>> it up.
>>
>> regards,
>> --le
>
> Colored bulbs have always been suspect although those
> sold as "ruby" lamps, with colored glass envelopes are
> better. I still use Kodak "beehive" safelights. They need to
> be checked occasionally since the filters can fade. Both
> Kodak and Ilford have procedures posted on their websites
> for testing, I think the Kodak one is called Publication
> K-4.
It is K-4, and you can get it from here:
http://www.kodak.com/global/en/consumer/products/techInfo/k4/k4Contents.shtml
> The beehive and also the large, square, safelight lamps
> show up used quite often, usually at pretty low prices.
> I prefer the OC type safelight to red ones although red
> safelights are probaby "safer".
>
>
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