Ferrite particle size

[blackcat4866]

This last week I was in a situation that required collecting dumped developer. It's not one of my favorite activities, but with a good strong magnet, I can get most of it. The problem is that I got more that the developer. I collected some toner rocks, which came back the next day as void lines at the doctor blade.

My question is, what is the current particle size of the toner and ferrite we're using on current models? I'd like to filter out the oversized particles. I just need a target value. The most recent machine that I have documentation on is the Kyocera Saturn, with toner particles around 5μm. Does anybody have data on MFP's of the last 8 years?

=^..^=

[NeoMatrix]

Re: Ferrite particle size

This last week I was in a situation that required collecting dumped developer. It's not one of my favorite activities, but with a good strong magnet, I can get most of it. The problem is that I got more that the developer. I collected some toner rocks, which came back the next day as void lines at the doctor blade.

My question is, what is the current particle size of the toner and ferrite we're using on current models? I'd like to filter out the oversized particles. I just need a target value. The most recent machine that I have documentation on is the Kyocera Saturn, with toner particles around 5μm. Does anybody have data on MFP's of the last 8 years?

=^..^=

What are you up to BC...? Are you pressing sulphur, polymer binder and ferrite powder into a mould and making fridge magnets or RF chokes?
The magnetizer power unit would be the most interesting part of project though...

Used FE powder can be recycled\re-used into many interesting projects.

Sorry I don't have any micron data for FE powders. I'll let you know if I find any info...

[Larhal]

Re: Ferrite particle size

Hey Blackcat,

Most of the ferrites used today are in the 30- 60 micron range.

We purchased a lab sieve with a 100 micron opening and use that to screen the lumps out of the carrier. Works a charm.

Larhal

[Larhal]

Re: Ferrite particle size

One other thing BC,

The toner particle size is 7 microns +/-.

Larhal

[NeoMatrix]

Re: Ferrite particle size

Hang five will I drag my Verniers/Micrometer out of the box.
I should have some very very old Toshiba BD 58, BD 88 ferrite developer laying around, I'll see if I can find it.

.... Ok I'm back....

I measured both developer particle size at 0.016-0.018 mm = ~18 um.


I have some old Xerox developer laying around somewhere , would you like me to measure that for use as an overall average ?

HTH

[blackcat4866]

Re: Ferrite particle size

Hey Blackcat,

Most of the ferrites used today are in the 30- 60 micron range.

We purchased a lab sieve with a 100 micron opening and use that to screen the lumps out of the carrier. Works a charm.

Larhal

This is exactly what I was thinking of. Can you share the source of the lab sieve? Thanks in advance.

One other thing BC,

The toner particle size is 7 microns +/-.

Larhal

That's about what I would expect.

Hang five will I drag my Verniers/Micrometer out of the box.
I should have some very very old Toshiba BD 58, BD 88 ferrite developer laying around, I'll see if I can find it.

.... Ok I'm back....

I measured both developer particle size at 0.016-0.018 mm = ~18 um.


I have some old Xerox developer laying around somewhere , would you like me to measure that for use as an overall average ?

HTH

That's the problem. The last data I had goes back to the old BD days. Thanks for taking the time. =^..^=

[NeoMatrix]

Re: Ferrite particle size

This is exactly what I was thinking of. Can you share the source of the lab sieve? Thanks in advance.



That's about what I would expect.



That's the problem. The last data I had goes back to the old BD days. Thanks for taking the time. =^..^=

You might be able to use a Petroleum funnel with a micro-gauss water filter in situ.
You can purchase in-the-tank micro-guass filters for small petrol motors. They are a cylindrical funnel that sits in place at the fuel cap opening, and filters water and rubbish from the fuel source.

It should remove the toner out of the developer at the very least.

[blackcat4866]

Re: Ferrite particle size

Maybe something like this?:

Cole Parmer 3 Diameter Sieve Full Height Stainless Steel No 200 75 from Cole-Parmer

59987_19 No200 Sieve.jpg
=^..^=

[NeoMatrix]

Re: Ferrite particle size

Maybe something like this?:

Cole Parmer 3 Diameter Sieve Full Height Stainless Steel No 200 75 from Cole-Parmer

[ATTACH=CONFIG]32940[/ATTACH]
=^..^=

Yeah, I was think more about the plastic ones in general.
The metal item shown in the image should do the job...
Nice price$ though....

[NeoMatrix]

Re: Ferrite particle size

I just had a light bulb moment.....

What about a hobby screen printing frame ?
You can purchase screen printing frames from any arts and crafts store.
They are a A4 or bigger wooden frame with a polymer micro-screen stretched over the frame .

You could ask IowaTech if he has an old RisoGraph drum laying around. You might be able to use the metal micro-screen in one of those ?

[blackcat4866]

Re: Ferrite particle size

I just had a light bulb moment.....

What about a hobby screen printing frame ?
You can purchase screen printing frames from any arts and crafts store.
They are a A4 or bigger wooden frame with a polymer micro-screen stretched over the frame .

You could ask IowaTech if he has an old RisoGraph drum laying around. You might be able to use the metal micro-screen in one of those ?

What do you think, Iowatech? =^..^=

[NeoMatrix]

Re: Ferrite particle size

What do you think, Iowatech? =^..^=

How'd you get on with the micro screen ?

Did you find anything to do the job ?

[blackcat4866]

Re: Ferrite particle size

I'm probably going to spend the bucks on the real thing, just not today:

59987_19 No200 Sieve.jpg
=^..^=

[NeoMatrix]

Re: Ferrite particle size

I'm probably going to spend the bucks on the real thing, just not today:

[ATTACH=CONFIG]33081[/ATTACH]
=^..^=

<thanks click>

Yeah righto, let us know how the metal sieve goes.

I've played around with washing the toner out of developer,
washing it works quiet well.
But I've never had the motivation to use it again in a copier to confirm it
works for any length of time.

I might re-visit this thread again in a month or so...





Disclaimer :
Do not try this at home.
NB. Nobody ask how to wash developer, this is an open public forum...

[Iowatech]

Re: Ferrite particle size

What do you think, Iowatech? =^..^=

Crap, I missed this, um, sorry about that.
As it turns out I do have one old Riso drum out in the shed. And as luck would have it, in a couple of weeks I'll probably be out in that neck of the woods, too. I'm not sure about the exact itinerary yet, so if you're still interested in this let me know and I'll find out for sure.
I'm not sure how well this would work though. I'd guess the drum shell would be too course of a sieve for breaking up coagulated developer back to its intended size, and the drum screen would be too fine. And the actual ink filter is smaller than a dime, so that seems like it wouldn't be terribly productive. It might be more economical to use a flour sifter. That was a special tool I used to carry back in the day for a similar issue.