Digital BW, The Print

Frank,
> 
> What is the recognzed 'archival' method of adhering a print either
to 
> a backing board or behind the window mat - is there a 
> safe 'removeable' tape that wont damage the print/paper, or a glue, 

The classic technique is to use japanese tissue paper (also used for
book repair) and wheat 
starch glue.

The glue is actually easy to prepare from flour by repeated washings
to remove gluten etc. 
and then you cook it briefly in a microwave.

> or must I use picture corners.

Archival picture corners are easy and good.

 In the old days, we used to tack the 
> print with a hot iron and a 'seal' waxy/tissue product - I forget
the 
> name.

This technique may be archival but is not easily reversible and
consequently not favored 
by museums etc.

Jonathan