Over the past 20 years photochemical texturing of mold has be came fully established in the plastic processing industry.The mayor advantage of a design that is automatically transferred to a product during the molding process is separate finishing to each part is no longer necessary.Photoetching also has a great advantage over other methods of mold decoration in that the finished mold can be tasted and the molded parts checked for wall thickness and dimensional accuracy before texturing.
Texturing has more than decorative advantages.Minor surface flaws that can occur during the molding process are comouflaged.The surface of a textured part is less sensitive to fingerprints and scratching,which reduces reject rates caused by light damage during handling or assembly.
It must be remembered that this decoration process is carried out by photographic and chemical means and is not in itself a precise science.There are many variables in the constructions of a mold before it is textured.Although specialized etching techniques can help to compensate for inconsistencies to a certain extent,an etchant's performance is primarilly determined by the properties of the metal.
In this chapter variables in the photo etching process will be pointed out,alternatives and remedies suggested,and information given on what is and is not compatible with a photo etching procces.
Texturing has more than decorative advantages.Minor surface flaws that can occur during the molding process are comouflaged.The surface of a textured part is less sensitive to fingerprints and scratching,which reduces reject rates caused by light damage during handling or assembly.
It must be remembered that this decoration process is carried out by photographic and chemical means and is not in itself a precise science.There are many variables in the constructions of a mold before it is textured.Although specialized etching techniques can help to compensate for inconsistencies to a certain extent,an etchant's performance is primarilly determined by the properties of the metal.
In this chapter variables in the photo etching process will be pointed out,alternatives and remedies suggested,and information given on what is and is not compatible with a photo etching procces.
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