… in the flat, sensitised, unexposed, of any material other than paper, paperboard or textiles; instant print film in …
Explanatory notes
… in the flat, sensitised, unexposed, of any material other than paper, paperboard or textiles; instant print film in … of metal or other material. Some of these plates must have their degree of sensitivity enhanced prior to exposure and other plates must have the degree of hardening of the irradiated sections (thermally) enhanced …