Peter,
Thank you!
I also use FP4+ quite a bit. The Delta 100 is giving nice results for alt-pro. I just ordered a box of D100 8x10 to enlarge 5x7 negs onto; have been using FP4+ for enlarged negs. The ES for both the "new" cyanotype and argyrotype has been about 2.1 on untreated Arches plantine. I did a paper test today with fumed silica on Arches plantine and"new" cyanotype ; a definite increase in contrast and loss of speed. The sensitizer behaves so differently after applying the fumed silica; still struggling for more even control...
Thank you for the reply...I was wanting to order more wp film this year and wondering if I should order d100...I previously ordered fp4 but am ambiguous about it..d100 seems to be more flexible with reciprocity...and if it works with cyanotype or azo I'll be happy. .again thank you