Question 1153358
DYE solutions of 50%?  80%?  70%?   Are these from solid dyestuff powders?  Is dissolution done just in water?  Any use of an alcohol?  Are these dispersions and not just "solutions"?



x liters of the 50%
10 liters of the 80%


{{{(0.5x+0.8*10)/(x+10)=0.7}}}

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