Gray background won't print solid, help please

[hmunster123456]

I'm trying to print a picture of old bottles that I photographed on a light gray background, I'm running Photoshop CC.(did not see a forum for that here). Anway, the bottles print fine, but my background won't print solid. I get a wide gray streak and then a wide white streak repeated across the page, not solid gray. I'm printing on a Canon laser printer. Can anyone help me, I've tried many different settings but nothing works. The machine isn't dirty, other pictures print fine that don't have a gray background. I also have a new toner cartridge. Thanks.

[Glenn 8675309]

Change the image to 16 bit or higher. I'm assuming it's a black and white printer. 

[Jeff Arola]

Link to the Photoshop forum:

https://community.adobe.com/t5/photoshop-ecosystem/ct-p/ct-photoshop