Bad fixing/bubbling on dark areas

[dagoof]

Was wondering if anyone could help with a problem I'm having on my 3200 - whenever I print on heavier paper, certain dark areas of images (e.g. dark blue, black...even dark green) won't fix properly. It doesn't seem to happen with all images equally - some can be a similar shade but the copier just doesn't lay the toner down as thick. Likewise, even when the problem's there it's maybe every 1 in 8 sheets.

I've tried reducing the densities of each colour but that didn't seem to help.

[Oze]

If the paper is a coated stock that would explain the bubbling.
You can't run coated stock in an iRC3200 series unfortunately.

[dagoof]

Yeah, it's coated Oze - thanks for the info. Strange that it's not consistent though and is sometimes fine, I thought there might be a way to lower the level of toner application.

[Oze]

Nah..I hear it a lot from customers that have been running that stock without issue for a while...but Canon doesn't support coated paper in the 3200's so we just tell customers to be thankful that they got ANY through the machine.
Usually if a customer asks me can they run a certain stock while I'm on a call at the machine I ask them to try while I'm there...if it runs the paper then I tell them there is no guarantee and if the stock jams in the fuser that it may be a charge call to remove the jammed stock.

[Monsoon]

Just a thought, could you not turn up the fixing temperature slightly to compensate?

[Oze]

Nah..it tends to melt to the actual UFR when you do that and it's a bitch to clean