PJ,
Thank you for that interesting idea. It sounds as a very possible
scenario.
Igor
P.J. Alling Thu, 23 Jul 2015 08:14:48 -0700 wrote:
I think the use of PL by some manufactures goes way back, there was once a
standardized filter nominclature, that used letters, A for red, K[#] for
Yellows, G for Deep Yellow.
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