BH-C-280/360, color developer units, how much developer and how much toner in it

[Hansoon]

Have asked this before but forgot the answer. For the BH-C-280/360, color developer units, how much developer and how much toner to add in it? I would expect around 6.5% of the total volume, roughly as the usual TC ratio. Anyone knows the exact answer?

Hans

[allan]

Hi Hans are you able to get dry developer?

[Hansoon]

Hi Hans are you able to get dry developer?

Hi Allan, yes, I have it here.

Hans

[blackcat4866]

Can you vacuum out a spare unit, then weigh it on a precision gram scale to establish weight when empty? Then weight a new unit, and subtract the difference. Toner density should be 6% to 6.5% (by weight or by volume?). =^..^=

[allan]

Hi Allan, yes, I have it here.

Hans

Nice so you can just add any color toner!

Like BC mentioned it other wise by weight or volume. Trying it by weight should be easy enough.
So 6.5 grams of toner per 100 grams of developer or 65g per 1Kg.
If that is to far out then by volume.

[Hansoon]

According to Hop-Sing a pouch with replacement color developer for the BH-C-280/360 series contains 210gr. Developer plus the necessary added toner, obviously.

I'll take that as an indication and will take 210 gr developer minus 6.5% weight for the toner in it which makes +/- 195 grams developer and then add 6.5% color toner by weight, which is around 14 grams getting roughly 210 grams total weight. Better slightly less toner than too much in the beginning.

I have virgin developer, so theoretically I must be able to produce either C, Y, or M

(I hope..........)

Hans

[allan]

Sounds like a plan. It would be good to know how this works out.
What color is that developer? I would guess charcoal grey.


There is another way I can think of. Using the same TD sensor...
Leave me with it and i will automate it

[Hansoon]

Sounds like a plan. It would be good to know how this works out.
What color is that developer? I would guess charcoal grey.


There is another way I can think of. Using the same TD sensor...
Leave me with it and i will automate it

You mean, Allan, to use an already initiated TD sensor and let it complete the missing toner in the newly filled Dev unit by itself??

Sounds like a good idea, I didn't think of it yet.

Hans

[REGSIS]

Theoretically, if you put raw developer in dev tank TCR should be 0%.
Magnet roller should be covered only with developer (black alike) regardless of color. TCR tonner add should do the rest.

If you had problem with white bushings of toner hopper of 4 series, result was the same. TCR showed 0% no toner on magnet roller. If that can be recovered after bushing replacement, I don't see why it won't work in your case.

I'm just not sure if 210g of developer will be enough.
I would take BC suggestion and weight empty and full dev tank.

[Hansoon]

Just now emptied an old color developing unit. Got out 200 gr. of the old developer, a few was left to be vacuumed out. The emptied, clean unit weighs exactly 800 gr. Another well functioning color unit directly out of a machine with obviously the proper amount of developer and toner weighs exactly 1,000 gr.

So tomorrow I will fill the empty unit with 200+ gr. developer + 10 gr. toner and see what happens.

Allan's idea to use alternatively an already initiated toner density sensor from a working machine to let the system top up the toner automatically sounds good to me. Will try that too.

Regsis idea sounds good too, will take it in consideration as well, but cannot use the customer's machine for that, cause there I must present a working unit without any hassle with installing or set up. Will see if I can use our test machine we have in the workshop to prepare the unit here first.

Hans