filling a gap in Rosco filter VC printing w/ Aristo W45

[Andrew O'Neill]

Howard Bond wrote an article in PT magazine a few years ago about the same problem you are having with spacing. He solved it with a light yellow filter which is always placed under the same light head that you have...I'm not sure if he replaced it with the V54 bulb... I could have a look for the magazine if you want...

[Claude Sapp]

Howard Bond wrote an article in PT magazine a few years ago about the same problem you are having with spacing. He solved it with a light yellow filter which is always placed under the same light head that you have...I'm not sure if he replaced it with the V54 bulb... I could have a look for the magazine if you want...

I have seen references to the article, but never seen the article. If you put your hands on it, I really would like to read it.

I am going to try stacking filters tonight to see if I can fill the gap.

[Claude Sapp]

With the help of the members, I answered my question. I can stack filters to fill the contrast gap I found using single filters.

I stacked Rosco 3304 and 3315 filters to reduce contrast below what a single 3304 would give, and fill the huge gap between the 389 and 3304.

ISO numbers and Rosco filter numbers follow:

160 #389
140 #3304 (x3)
120 #3304 (x2)
110 #3304 & #3315
90 #3304 (found a CC40Y prints similarly)
80 #3315
70 #3313 or #3308 (seems I have reached a max contrast here)

I am going to use the 3304/3315 combination as my standard since the actual ES is 1.05, smack in the middle of Grade 2 with the Aristo W45 bulb. Excellent!

Now I need to calculate a printing time chart...

[Ginette]

With the help of the members, I answered my question. I can stack filters to fill the contrast gap I found using single filters.

I stacked Rosco 3304 and 3315 filters to reduce contrast below what a single 3304 would give, and fill the huge gap between the 389 and 3304.

ISO numbers and Rosco filter numbers follow:

160 #389
140 #3304 (x3)
120 #3304 (x2)
110 #3304 & #3315
90 #3304 (found a CC40Y prints similarly)
80 #3315
70 #3313 or #3308 (seems I have reached a max contrast here)

I am going to use the 3304/3315 combination as my standard since the actual ES is 1.05, smack in the middle of Grade 2 with the Aristo W45 bulb. Excellent!

Now I need to calculate a printing time chart...

Sorry to bump an old topic but it is the closer I found about what I search for.

I have an old W45 Aristo grid and I wish to put a permanent correction filtration behind the 14x14 diffusion panel. Look the CC40Y is the more appropriate but I don't find it in 20x24 sheet. Do someone find this CC40Y somewhere?
Is the #3304 (CC30 Green) a good substitute ?
or the combinaison of #3304(CC30 Green) + 3315 (CC15 Green) as suggested in this topic?

I don't want to split grade but made a basic correction to use Ilford Multigrade filters as explained here http://www.ilfordphoto.com/Webfiles/...0201152306.pdf