Function bath (A) for toning and / or coloring or
doping molded parts comprises (wt.%): deionized water, carrier (0.10-6), surfactant / emulsifier (0.001-1), surface active substance-D (0.01-7, preferably 0.01-6), surface active-substance-E (0.01-3, preferably 0.01-2), pigments or dopants (0.01-0.90), buffer (0-3) and optionally a dispersing agent (0-4) of ethoxy fattyamine ester, aralkylpolyglycol
ether or modified polyalcohol for anionic preparation. Function bath (A) for toning and / or coloring or
doping molded parts obtained form transparent or translucent (co)
polyamide comprises (wt.%): deionized water, carrier (0.10-6), surfactant / emulsifier (0.001-1), surface active substance-D (0.01-7, preferably 0.01-6), surface active-substance-E (0.01-3, preferably 0.01-2), pigments or dopants (0.01-0.90), buffer (0-3) and optionally a dispersing agent (0-4) of ethoxy fattyamine ester, aralkylpolyglycol
ether or modified polyalcohol for anionic preparation; where the carrier is monohydroxyglycol, ethyleneglycolmonobutylether or diethyleneglycolmonobutylether, the active substance-D is glycol (preferably
diethylene glycol or
triethylene glycol), and the active substance (E) contains at least a polyalkyleneglycol (I) of formula (R 1>-{[-O-(CH 2) n] m}OR 2>). R 1>, R 2>H; n : 2-4; and m : 6-35. INDEPENDENT CLAIM is included for: (1) a use of the functional bath in a method for toning and / or coloring or
doping molded parts with function additive of transparent or translucent co(
polyamide) in water comprising providing immerse bath and / or (A) comprising pigments, doping agent, interference
pigment, UV additives, photochromes or thermochrome additives, reinforcing additives for influencing the
refraction index; heating the baths at 50-95[deg]C; pretreating the molded part in the bath; purifying the molded part, and removing the purified molded part; immersing (A) in dye or doping agent, color pigments, interfering pigments, UV additives, photo chrome, thermochrome additive or contrast reinforcing additives; removing the molded part from (A) and treating the molded part; and followed by cooling and
drying the molded part of at least
thermoplastic of transparent (co)
polyamide; and (2) toned and / or
colored or doped molded part.