Why Magenta and Yellow

[webestang64]

This will give you an idea of starting points to select contrast for variable-contrast BW papers.
Y-yellow filter, M-magenta filter.

Desired Grade:	00	0	1/2	1	1-1/2	2	2-1/2	3	3-1/2	4	4-1/2	5
Durst filter settings (170M)	150Y	90Y	70Y	55Y	30Y	0	20M	45M	65M	100M	140M	170M
Durst filter settings (130M)	120Y	70Y	50Y	40Y	25Y	0	10M	30M	50M	75M	120M	130M
Kodak filters:	199Y	90Y	70Y	50Y	30Y	0	5M	25M	50M	80M	140M	199M
Meopta filter settings:	150Y	90Y	70Y	55Y	30Y	0	20M	40M	65M	85M	200M	---

Also Ilford has a tech sheet for contrast control.......PDF..... https://www.ilfordphoto.com/wp/wp-content/uploads/2017/03/Contrast-control-for-Ilford-Multigrade.pdf

 

[dennyr]

This will give you an idea of starting points to select contrast for variable-contrast BW papers.
Y-yellow filter, M-magenta filter.

Desired Grade:	00	0	1/2	1	1-1/2	2	2-1/2	3	3-1/2	4	4-1/2	5
Durst filter settings (170M)	150Y	90Y	70Y	55Y	30Y	0	20M	45M	65M	100M	140M	170M
Durst filter settings (130M)	120Y	70Y	50Y	40Y	25Y	0	10M	30M	50M	75M	120M	130M
Kodak filters:	199Y	90Y	70Y	50Y	30Y	0	5M	25M	50M	80M	140M	199M
Meopta filter settings:	150Y	90Y	70Y	55Y	30Y	0	20M	40M	65M	85M	200M	---

Also Ilford has a tech sheet for contrast control.......PDF..... https://www.ilfordphoto.com/wp/wp-content/uploads/2017/03/Contrast-control-for-Ilford-Multigrade.pdf

Not that i am THE Greatest at reading negatives.
But if the neg looks "Normal" i typically have the M at 20 on my Besseelr-45

Like you say, it is at least some place to start.

Oh Geez....what are then two types, Diffusion and Condenser.?
For B&W printing i find it easier to use my Non-Color head. But i like the way...the light system...of the color head prints.
I suppose it is like anything else...............if i did it long enough, i would get used to the condenser head enlarger.

For split printing it is arguably easier to use the slide in filters of the condenser head. But again, you adapt to cranking the knobs all the way instead. No big deal.
I am happy i have a darkroom with ANY Enlarger.
I cannot imagine shooting film without one.

Anyway...............Thanks Again for the replies.
I Appreciate It.