Gosh that is a tough question to answer. I am not sure that I can answer it definitively. So much depends on the actual image and the presentation that you want to give the image. Normally one increase paper contrast for that much of a size increase. Sorry that I could not be more help.
Are you saying that contrast decreases as the degree of enlargement increases? If so, this is new knowledge to me as I've only ever printed 8x10 and 11x14s.
Are you saying that contrast decreases as the degree of enlargement increases? If so, this is new knowledge to me as I've only ever printed 8x10 and 11x14s.
The "apparent" print contrast decreases as print size increases. The reason is that the tonal information is spread over a larger area.
Nothing insofar as the paper or the negative has changed...just that a larger print will appear softer then a smaller one all other things being equal.