Actually I found that you don't have to coat the whole back of the drawing, but just the back of the lines drawn on the front. I tell kids to scribble their pencils on the back of the lines they drew on the front, and it works for them.
San D
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> I have used this material with fifth grade and we transfer using the old Ebony
> pencil on tha back trick. Coat the back of the drawing with Ebony pencil, lay
> it on the block, and trace.
>
>