It is a very common problem with dichroic enlargers for slippage, stickiness,gear worn out issues with the three filters that slide into the light beam.
It is the first thing we looked for in the day . I worked at labs with over 100 dichroic enlargers in operations and the constant dialing of the filters took their toll.
The Deverre I use has 200magenta capability which I assure you matches a grade 5 filter printing on Ilford Warm Tone.
Another little side note with Dichroic filtration with manual adustments. If you are split printing with this type of enlarger or multiple negative printing , always approach the final number you are looking for from one direction , never approach back and forth until you get it. If you always come from the same direction you will get consistant results, coming at the number from above or below , will sometimes give you inconsistant results.
this is due to the gear mechanisim to the dichroics being a bit wonky.
This is very true with colour RA4 printing on a dichoic.
The only thing I do not like about ILFORD WARMTONE is the colour of the package, when Terry Bevins of Ilford asked me to beta test this paper when launched , I almost got sick looking at the package and was thinking ,, WHAT THE HELL ARE THESE BRITS THINKING,, until I opened the box put it in the easel and printed with it.** I made this paper my mainstay for my printing business, I only wish they could produce it for my lasers.
I have been printing now since 1973 , on a regular basis and the last 20 years printing has been the only source of income for me.
I have seen hundreds of papers over this time and wish some of them were still around and others proved to be real garbage in all manner of ways.
I will say this.
Ilford Warmtone Glossy paper ranks right up with any paper that I have used and those dissing this paper really need to do some proper testing.
It has a beautiful range, it is always consistant, it tones well , and the supply has always been there.... *except for those very dark days***
Simon , you can send my cheque to my new address.