H4E1L1I1O1T1Y4P3I1E1S1
19 points
HELIOTYPIES is validvalid
HELIOTYPY, [n]
HELIOTYPY, a photomechanical process in which the gelatine relief is itself used to print from [n]
HELIOTYPY, [n]
HELIOTYPY, a photomechanical process in which the gelatine relief is itself used to print from [n]