Hiding material defects by painting
Injection moulding of plastics and production of metal parts (regardless of the manufacturing technology) do not always result in high quality. There are defects that are difficult to eliminate in the manufacturing process and negatively affect the visual perception of the parts by the customer. In this situation, a properly selected paint coating is irreplaceable.
The general rule in our industry is that the quality of parts submitted for varnishing should be very good, because the coating after liquid varnishing is only from a few to a dozen or so microns. In the case of multi-layer varnishing – several dozen. For this reason, many defects cannot be hidden – such as very deep scratches, dents or heavy grease, especially the use of silicone separators in the injection process.
We have developed methods of dealing with many material defects.
Visible flow lines, non-uniformly distributed dye, unesthetic matting?
Most paints will perfectly hide such defects. Sometimes “burns” may appear in these places, i.e. the paint will spread differently in this place, the material will react to the thinners contained in the paint coating, but there are ways to deal with this. We select appropriate painting materials or use additional processes that will reduce or completely eliminate such defects.
Porous substrate, small cracks, pulls, scratches?
This is where we come in with filling primers that will fill in any gaps and provide a uniform, smooth base for the actual paint layer. An alternative is to choose a type of coating that will hide the mentioned defects – for example, structural coatings with different grain gradations or a very dense and velvety soft-touch.
Parts made of materials that corrode? We have tested anti-corrosion primers.
Plastics that have poor surface tension causing a lack of adhesion? We use additional supporting processes or adhesion primers.
During over 20 years of activity, we have encountered many difficult topics – we always approach them as a challenge, not a problem. We encourage you to learn about the types of paint coatings and contact us. We will help solve your problems.