ORWO NP55

NP55 is one of the survivors of the DDR-era Wolfen catalog. The NP prefix stands for Negativfilm Panchromatisch, and the line dates back to the East German VEB Filmfabrik Wolfen, the old Agfa plant that the post-war split left behind the iron curtain. Original Wolfen sold these stocks under the ORWO trademark from 1964 until liquidation in 1994, and the NP55 name carried forward into the FilmoTec and ORWO Net revivals that have kept the Wolfen line running since 1998.

It is fundamentally a fine-grain panchromatic cubic-grain emulsion, originally specified at 80 ASA and shipped today in 35mm at ISO 64. The speed shift is partly a hedge against age in distribution. Many current rolls come from older runs, and rating at 64 keeps shadow detail honest. With a fresh roll, rate at 80 and pull a third of a stop in development for a cleaner highlight shoulder.

The character is old-school. Closer to mid-century FP3 or APX 100 than to anything tabular. Grain reads as structured rather than smooth, contrast lands medium high out of the box, and the toe resists blocking shadows when you under-expose by half a stop. Compared with Fomapan 100 Classic at the same ISO, NP55 has slightly better edge sharpness and a touch less highlight latitude.

Developers that work well: D-76 at 1:1, ID-11, and the old DK-50 if you can find it. The Wolfen technical sheets historically favored DK-50 for edge sharpness and shadow detail. Rodinal at 1:50 gives it more bite than most photographers want from an ISO 64 stock.

Available in 35mm 36-exposure cartridges through ORWO's online shop and a handful of specialty dealers. The 16mm cine version sits in the FilmoTec catalog. No 120, no sheet.

Reciprocity exponent is 1.31. Zone Light Meter applies the correction past one second on the standard curve. A 30-second meter reading becomes about 90 seconds at the negative, the same math you would apply to Tri-X or HP5+. For indoor available-light work at small apertures, you will hit that threshold regularly.