Lab to production and production to production reproducibility problem, tailing problem,listing problem of critical earth tone shades with reactive dyes in jigger dyeing are analyzed.The non contrasting concept of reactive dyes of Novacron NC and the character of fluorotrazine active reagents are introduced, it´ s the base theory of problem solve critical earth tone shades with reactive dyes in jigger dyeing. The practice shows that Novacron NC dyes are excellent dyes, which provide the best solution to the earth tone shades.