Ilford FP3

FP3 was Ilford's medium-speed panchromatic from 1942 to 1968, twenty-six years of production that spanned the war years, the rise of 35mm photojournalism, and the Kodak Plus-X era. It started life at 64 ASA in roll and sheet, then got bumped to 125 in 1960 as Ilford caught up to industry-standard speed ratings and improved the emulsion. Most rolls you will encounter from estate sales date from the 125 ASA period.

The lineage matters. FP3 was the direct ancestor of FP4 and today's FP4 Plus, the medium-speed pictorial film that Ilford has been refining for sixty years. The 1968 reformulation that became FP4 added a double-layer emulsion design for better tonal scale, but FP3 was already known for fine grain and a smooth, mid-contrast curve. In the period it sat squarely opposite Kodak Plus-X as the European medium-speed staple. Press shooters chose HP for speed; landscape and pictorial workers chose FP.

There is no modern equivalent that prints identical, but FP4 Plus comes close. The grain on FP3 reads a touch larger than Plus-X did, with a slightly warmer scan response. Develop in ID-11 at 1:1 or Perceptol if you want the smoothest tonality. Avoid pushing; FP3 was not designed for it and aged stock will block shadows before the highlights catch up.

Format availability covered the working photographer's range in its day, including 35mm, 120, and sheet sizes up to 5x7. Today there is none of it in production. Frozen rolls turn up occasionally, generally fogged, and the keeping has been long enough that any film from a 1968 final run is fifty-eight years old now. Expect base fog and rate it down to 64 or even 32 to compensate for shadow loss.

Reciprocity exponent is 1.26, which puts FP3 between the modern Acros II and Tri-X on the failure curve. Zone Light Meter applies the correction past one second. A 30-second meter reading becomes about 75 seconds at the negative. The correction is mild enough that handheld outdoor work rarely needs it; tripod and indoor work crosses the threshold quickly.