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business category --> o, optical equipments & supplies in india / kolkata / calcutta online business directory of calcutta optical equipment & supplies president optical co. himalaya vision care centre optical palace quality opticians sight optical shop gkb lens (p) ltd. kundu optic house royal optics...
business category --> o, optical equipments & supplies in india / kolkata / calcutta online business directory of calcutta optical equipment & supplies president optical co. himalaya vision care centre optical palace quality opticians sight optical shop gkb lens (p) ltd. kundu optic house royal optics...
inks, ceramics and plastics. they are applied by using a dispersion in a suitable medium. most pigments used are also organic compounds. manipulating the colour and application of dyes this section considers some of the chemistry behind the colour of dyes and how the target material, for example a fibre...
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