0 0 0 0 0 0 0 0 0 3707.90 Preparation of chemicals for photographic uses, incl. unmixed products put up in measured portions or put up for retail sale in a form ready for use (excl. varnishes, glues, adhesives and similar preparations, sensitising emulsions and salts and compoundsmetal compounds etc. of heading 2843 to 2846)