I have a few negatives that I just can’t get right. The sky has details on the negative but is completely blown out in the print because I’m trying to get detail on the church in the frame. the roof structure of this building is too complicated to burn or dodge around it without obvious halos.
I’m thinking of masking but only have a Leitz 1C and an LPL VCCE 120 enlarger.
do I need a 4x5 enlarger to use negatives masks?
One thing to remember is that the lower grades (00, 0, 1) will add density to the lighter (highlight) tones in the image before they start to have any noticeable effect on the midtones or shadows. There is a limit to how far you can push this before halos start to appear, but it can be very effective in bringing out highlight detail without changing the adjacent midtones. I will often cut out a rough dodging or burning mask to selectively burn the highlight area. Higher grades like 4 or 5 will add density to the shadows quickly, before any changes are seen in the highlights.
Another option to try is to pre-flash the paper to get closer to the density threshold for the highlights before exposing with the negative. This may help bring out some density in the sky without affecting the rest of the image.
Here's an example I've used before, of the straight print at Grade #2 and the final print using multiple grades with burning and dodging. Base exposure ended up being at grade 4 or 4.5, but the biggest problem was that I lost all detail in the sunlit area at the bottom. I selectively burned in this area at Grade 0 to show some detail, but not look manipulated. Other areas of the print were burned in at Grade 3 to add density.
Any enlarger will do. While I use 4x5 sheets when making masks for 35mm, all I do is cut the mask to the same size, align them on a light board and hold them together with Scotch Magic Tape.
Whether or not masking with 35mm negatives will work for you may depend on how suitable the carrier in your enlarger is for it.
Registration of the negative and the mask can be the biggest challenge.