Photographers Formulary Polysulfide toner?

[removedacct1]

I recently acquired a package of Photographers Formulary Polysulfide Toner, and yesterday I opted to mix it up and use it to tone some 8X10 contact prints I made on MGIV Fiber Warmtone. This is the first time I've used this toner, so I have some questions, since it didn't behave as I expected.
When I mixed the solid into RO water, it didn't exactly "dissolve"; it made a messy slurry that looked as if I had dumped a handful of volcanic ash into the water. Twenty minutes of stirring and it still looked like that, so I continued with adding the second component, and mixed it. I have no idea if that was normal for this toner, but I suspect not, as I toned one of my prints in it for 25 minutes at 75F and I had great difficulty in seeing a difference between the toned print and the un-toned ones. I expected after 25 minutes that I'd have something more along the lines of the "rich, chocolate brown tones" this toner is supposedly capable of producing (my print doesn't come remotely close to that description). I had to wipe a heck of a lot of scum off the print in the wash water as well.
So, can anybody who's used this toner advise me? Is this normal for this toner (including the subtle result) or have I been sold a bad/expired batch of toner?

 

[Arthurwg]

I believe that MGIV FB is very difficult to tone. Suggest you try Ilford warm tone.

 

[removedacct1]

I believe that MGIV FB is very difficult to tone. Suggest you try Ilford warm tone.

Sorry, I omitted that detail from the post: I did in fact make the prints on Ilford MG Warmtone Fiber, not the standard MGIV.

 

[removedacct1]

Paul, although I'd agree to some extent that MGIV is somewhat more resistant to certain toners than other papers, the rest of your story doesn't sound normal to me. Seems like you had a bad batch of toner.

I've had several people state that the solids should have dissolved thoroughly into the water, which definitely did NOT happen for me. Thanks, Michael.