Since I made more than 1 enlargement from the step wedge, I re-read the
densities of all of them and found that the anomaly that I found only
happened with more exposure (when the density goes above 1.6). Those made
with low exposure, the steps go proportionally.
Since the density of 1.6 is still much lower than the capability of graphic
arts film, I am now suspecting that Dektol 1:9 is way too much diluted. I
developed the film for 2 mins. That could be too short too. I will do more
test and post the result to the group if anyone is interested at all.
By the way, the Dektol 1:9, 2-min development was suggested by someone from
another newsgroup. Does anyone here use Arista graphic art film for enlarged
negative? Could you recommend a chemical, dilution, and time as a starting
point? Thanks in advance.
David S.