Ilford Multigrade and Analyser Pro

[Brian Jeffery]

I've calibrated my Analyser Pro using MG IV 5x7in. When printing on other sizes 10 x 8 etc I've not noticed any noticable errors in the exposure (This might just be luck though). However, when printing a particularly thin negative to a postcard I first test printed on a 5 x 7 sheet as these sheets are approximately half the cost of a postcard. However, when I exposed the final print on the postcard I noticed that it was about 1/12th of a stop too dark at grade 4.

Well, I thought, that'll teach me. I should have calibrated all my paper before being stupid enough to use different paper stocks to find the correct exposure.

So, what's my question? Well, I've got several different sizes of MG IV:

4x6in
5x7in
10x8in

in glossy (all batch 1455 7086)

5x7in in Satin finish (batch 1455 7088)

91/2 x12in in pearl finish (batch 1455 7089)

and Postcard sized Portfolio (batch 1455 7092)

All the MG IV glossy has a batch number of 1455 7086. Is it reasonable to assume that I won't need to calibrate the analyser pro for the different paper sizes? Not that calibration is too big a chore, but anything for an easy life.

In other words, should I reserve a PAP channel for each batch number, not each box of paper?


Brian

 

[Saganich]

Brian,
I havent noticed any significant different when going from different batches or different sizes. But a 1/12 of a stop is small enough that you could chalk it up to most any variable.

Chris

 

[Mick Fagan]

Brian, I have had the same effect. Whilst I enlarge completely manually, I enlarge in increments of 1/8th of a stop.

I too have noticed that when switching from MGIV Pearl 8x10 to Postcard Portfolio stock the image is about 1/8 to 1/16 of a stop darker or lighter, nearly always.

Another thing I've noticed about Postcard stock is that the paper grading requires me to adjust by about a ¼ of a stop harder or softer. This though is probably due to the different base.

The main thing though, is that the diference isn't much and you should get a quite acceptable print first time around.

Ilford paper over the years has always been quite consistant, even from batch to batch. There are variables from the same batch, I firmly believe that whilst you can safely go from one box to another without a change being required, one usually requires just a poofteenth of a difference in very small enlargements. Sometimes as little as 1/10 of a second can make the whites just that much better.

Mick.