5302 Kodak is a b&w positive only sensitive to blue radiation. It is designed to work as a positive - contrast 2.6.
I use it as negative when trying to reduce contrast to a 0.8 - 1.00.
Films with low sensitivity (~ 3-6 ISO) have a small grain.
DP 3 is a panchromatic film is designed to work like dup positive - contrast 1.6. I use it as a negative when trying to reduce contrast to a 0.8 - 1.00.
By reducing the contrast I fail to increase exposure latitude.