This group is for those interested in Philips Tri-One enlargers. These enlargers use pure red, green, and blue cutoff filters in an additive printing process. Known model numbers include the Philips PCS2000, PCS130, PCS150 and the Paterson PCS2500. Others may be out there but we dont know their designations. If you have any information on these enlargers, copies of articles, manuals, tech booklets etc... please feel free to place them in the files area. We have made this a membership group so that we can control the spam that seems to be accumulating everywhere lately.
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