▁at ▁T imm ins , ▁Ontario . ▁It ▁is ▁based ▁around ▁the ▁use ▁of ▁re usable ▁c ath ode ▁st arter ▁sheets ▁for ▁co pper ▁elect r ore f ining ▁and ▁the ▁autom ated ▁stri pping ▁of ▁the ▁depos ited ▁“ c ath ode ▁co pper ” ▁from ▁them . ▁ ▁Introduction ▁ ▁The ▁current ▁Isa K idd ▁technology ▁represents ▁the ▁mer ger ▁of ▁the ▁co pper ▁ref ining ▁techn ologies ▁developed ▁by ▁the ▁two ▁different ▁organis ations . ▁The ▁initial ▁Isa ▁Process ▁development ▁in ▁the ▁late ▁ 1 9 7 0 s , ▁with ▁its ▁re usable ▁st ain less - ste el ▁c ath ode ▁st arter ▁sheets , ▁represented ▁an ▁advance ▁on ▁the ▁previous ▁technology ▁of ▁single - use ▁st arter ▁sheets ▁of ▁pure ▁co pper , ▁the ▁production ▁of ▁which ▁was ▁a ▁labour - int ensive ▁process . ▁ ▁The ▁production ▁of ▁the ▁single - use ▁st arter ▁sheets ▁involved ▁lay ing ▁down ▁a ▁sheet ▁of ▁co pper ▁by ▁electro ly s is ▁on ▁each ▁side ▁of ▁a ▁“ m other ▁plate ”. ▁Gener ating ▁the ▁sheet ▁took ▁a ▁day , ▁and ▁thousands ▁of ▁sheets ▁could ▁be ▁needed ▁every ▁day . ▁Origin ally , ▁the ▁co pper ▁st arter ▁sheets ▁were ▁separated ▁from ▁the ▁mother ▁plate ▁manually , ▁but ▁over ▁time ▁the ▁process ▁was ▁autom ated . ▁In ▁addition , ▁limitations ▁associated ▁with ▁the ▁use ▁of ▁co pper ▁st arter ▁sheets ▁meant ▁that ▁it ▁was ▁difficult ▁to ▁meet ▁the ▁pur ity ▁specific ations ▁of ▁some ▁new ▁co pper ▁applications