Printing On 2nd side of paper

I have a HP2100 and when I try to put paper through for the second side it almost always screws up. I am using a 20lb paper.

Hoping someone can help me out.

Chris

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In what way?

Hi there. In what way is it screwing up? Is it catching and tearing the paper? Is it printing upside down on the 2nd side? What are you trying to print exactly?
-Sarah

paper gets jammed seems

paper gets jammed seems to not want to lay smooth after going through the printer once

First Suspect: Paper Quality

Try some heavier/higher quality paper.

I found I had to go to at least a 24# stock on my inkjet to get away from duplex ink-bleed
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"I think the surest sign that there is intelligent life out there in the universe is that none of it has tried to contact us." (Calvin and Hobbes/Bill Waterson)

Details, please

Google says this is a laser printer.
Does it have a duplex unit or are you putting the pages back in manually for second-side printing ?
Also, like Sarah asked, exactly how it it screwing up ?
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"I think the surest sign that there is intelligent life out there in the universe is that none of it has tried to contact us." (Calvin and Hobbes/Bill Waterson)

Check your manual..

Hi.

Some laser printers do not like manual duplexing. Your manual will tell you whether it can or can't handle this. One thing I noticed in my HP 1200 manual is that they have a lot of caveats about paper quality and stuff. Mine has a 'manual duplexing' mode that is visible in the printer properties page.

shris

hp

I have a hp 3300 and I have been able to print duplex. what it does for me is all of one side print out and you flip it over. on mine the paper prints too and from the same place.
I also have a hp 1800 and I'm not sure how that works with it.

Paper not created equal

Not only is all paper not created equal, neither are the two sides of a piece of paper. Maybe to help, a little history. :-)

Paper is generally made in huge, continuous sheets or rolls before it is spooled off, and cut to size. But when it's made, it was traditionally dried pressed between felt above and wires below. So, in the end, you have two different sides to the paper, the nice, smooth, "felt" side, and the more rough "wire" side. The proper side to write and copy on was the felt side. Better paper companies put an arrow on the packaging pointing to the felt side. Although technology has improved upon the traditional method (I was visited a Champion mill where they were able to produce copy paper that was pretty much equal both sides), you still have to deal with the fact that one side faces up, and the other down when drying. What this does is create very slight differences in the consistency of the paper.

Under normal conditions, at normal tempertures and humidity, you won't notice this difference, but stick that paper into a laser printer, and the extreme tempertures used to fuse the toner powder to the paper pushes the paper beyond its ability to retain its flatness, causing curl.

It is this curling that is causing your problems. There is one simple solution you can try before purchasing more expensive and thicker paper. Before you spend the money, simply flip the paper over in the printer tray and print your first side on the other side of the paper. I found that my ancient LaserWriter IIg had no problems with some cheaper papers if I printed on the wire side first, and felt side second, but if I printed on the felt side first, I would get frequent jams.

So, my advice would be to try the following in this order.
1. Print wire side first. If that fails
2. Get thicker paper. 20lb is honestly rather flimsy, even though it may be best if you want to stack lots of paper in a binder. ;-)
3. Try better papers. 9 times out of 10, better paper will feed better than cheaper paper.
4. Go ink jet. ;-) I know, I prefer laser too, but in the end, typically, I almost never get paper jams with ink jet, which I cannot say for laser.

HT all H
-Jon