Oval Frame

[Roger Eichhorn <eichhorn@xxxxxx>]

I have an antique oval frame that has a bowed glass in it.   It  
displays a tinted B&W print of a child and appears to be something  
from the late 19th century.  The child's costume is certainly of that  
era.  The print is  bowed to match the curvature of the glass.  I   
don't intend to take the photo out to replace it with something else,  
but I have another similar frame that's empty that I might want to  
fill someday.  My question is, how would I go about bowing a print to  
match the curvature of the glass?  I suppose at one time, they had  
molds, perhaps of plaster, to accomplish the task.

Roger