Yes, sorry, 1" and 10". Kodak made papers for photo labs with the aim centered at 1' or shorter and another range of papers for enlarging with the aim centered at 10" and above. We used to run 2 tests on each emulsion or coating to see which range it would be most suitable for. We also used to base experiments on these two ranges.

Usually the one paper was sold in narrow rolls and the other was sold in sheets or wide rolls.

In the case of color, the curves were adjusted slightly to favor neutral for the narrow paper, and slightly pink for the wide and cut sheet. The latter was to make flesh tones and whites more appealing, as the majority of prints were of weddings or were portraits.

Reciprocity failure was critical in this case as color could shift.

PE