Re: BL vs BLB tubes for cyanotype

From: Ender100@aol.com
Date: 11/16/05-11:56:47 PM Z
Message-id: <20a.e956fe8.30ad759f@aol.com>

Sandy,

What instrument would one use to measure the spectrum of light passing
through some material such as the glass you are talking about? Where might one get
access to one? Would my doctor's colonoscope work?

Would it be a Spectrophotometer?

Thanks,
Best Wishes,
Mark Nelson
Precision Digital Negatives
PDNPrint Forum @ Yahoo Groups
www.MarkINelsonPhoto.com

In a message dated 11/16/05 9:18:48 PM, sanking@clemson.edu writes:

> Well, not quite 909%. The intended percentage was 90%.
>
> Sandy
>

Best Wishes,
Mark Nelson
Precision Digital Negatives
PDNPrint Forum @ Yahoo Groups
www.MarkINelsonPhoto.com
Received on Wed Nov 16 23:57:04 2005

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