Xylene transfer: works great for line drawings and text.
This method is toxic I do it outside wearing a respirator and rubber gloves. Please read warning labels as well.
Take your photocopy to your receiving material and using a rag soaked in xylene apply a single coat over the back of your photocopy, without saturating the paper too much. Burnish the back of the image. I find sometimes I have to re soak the rag a few times as the Xylene dries out fast. Peel up the corner and check your image. Repeat applying Xylene and burnishing until satisfied. The Xylene basically transfers the toner image from your photocopy to the other surface.
Materials obtainable from Spectrum Art & Office.