▁smaller ▁and ▁hot ter ▁than ▁the ▁previous ▁one . ▁The ▁can e ▁ju ice ▁began ▁in ▁the ▁largest ▁k ett le . ▁The ▁ju ice ▁was ▁then ▁he ated ▁and ▁l ime ▁added ▁to ▁remove ▁imp ur ities . ▁The ▁ju ice ▁was ▁sk im med ▁and ▁then ▁ch anne led ▁to ▁success ively ▁smaller ▁k ett les . ▁The ▁last ▁k ett le , ▁the ▁" te ache ", ▁was ▁where ▁the ▁can e ▁ju ice ▁became ▁sy rup . ▁The ▁next ▁step ▁was ▁a ▁cool ing ▁tr ough , ▁where ▁the ▁sugar ▁cry st als ▁hard ened ▁around ▁a ▁stick y ▁core ▁of ▁mol ass es . ▁This ▁raw ▁sugar ▁was ▁then ▁sh ove led ▁from ▁the ▁cool ing ▁tr ough ▁into ▁h ogs head s ▁( wood en ▁bar rel s ), ▁and ▁from ▁there ▁into ▁the ▁cur ing ▁house . ▁ ▁In ▁the ▁British ▁Empire , ▁slaves ▁were ▁liber ated ▁after ▁ 1 8 3 3 ▁and ▁many ▁would ▁no ▁longer ▁work ▁on ▁sugar c ane ▁plant ations ▁when ▁they ▁had ▁a ▁choice . ▁British ▁own ers ▁of ▁sugar c ane ▁plant ations ▁therefore ▁needed ▁new ▁workers , ▁and ▁they ▁found ▁cheap ▁labour ▁in ▁China , ▁Portugal ▁and ▁India . ▁The ▁people ▁were ▁subject ▁to ▁indent ure , ▁a ▁long - est ab lished ▁form ▁of ▁contract ▁which ▁bound ▁them ▁to ▁forced ▁labour ▁for ▁a ▁fixed ▁term ; ▁apart ▁from ▁the ▁fixed ▁term ▁of ▁serv itude , ▁this ▁res emble d ▁sla very . ▁The ▁first ▁ships ▁carrying ▁indent